Big Huge Thesaurus

thoughtless

adjective

• uncaring
• unthinking
• heedless
• unheeding

antonyms

• heedful
• thoughtful

related terms

• inconsiderate

similar terms

• unthinking
• careless
• deaf
• inconsiderate
• indifferent
• regardless
• unconsidered
• unreflective
• unthoughtful

sounds kind of like

• tactless
• tasteless
• thistlelike

rhymes with

• abacus
• abruptness
• absoluteness
• accomplice
• acidosis
• acropolis
• actress
• acuteness
• advantageous
• aegis
• ageless
• aggressiveness
• agribusiness
• aimless
• airbus
• airless
• airworthiness
• alertness
• all-purpose
• aloofness
• alumnus
• amaryllis
• ambassadress
• ambidextrous
• ambitious
• amorphous
• amos
• analogous
• analysis
• anas
• androgynous
• angus
• animus
• anise
• anomalous
• anonymous
• antithesis
• anxious
• apotheosis
• apparatus
• apprentice
• appropriateness
• aquinas
• arbitrariness
• archdiocese
• arcturus
• argus
• armistice
• arteriosclerosis
• arthritis
• asbestos
• asbestosis
• asparagus
• assertiveness
• assiduous
• astuteness
• asynchronous
• atlas
• atrocious
• attentiveness
• atticus
• attractiveness
• audacious
• augustus
• auspicious
• australopithecus
• autonomous
• awareness
• awfulness
• awkwardness
• axis
• bacillus
• backless
• backwardness
• badness
• balas
• baldness
• baseless
• basis
• beatrice
• belarus
• bigness
• bitterness
• bituminous
• blackness
• blameless
• blandness
• blasphemous
• bleakness
• blindness
• bloodless
• bluntness
• bogus
• boldness
• bolus
• boneless
• bonus
• boorishness
• bottomless
• bounciness
• boundless
• brashness
• breathless
• brightness
• bronchitis
• brontosaurus
• brutus
• bruxelles
• bulbous
• burgess
• business
• buttress
• cactus
• calamitous
• calculus
• callous
• callousness
• callus
• calmness
• campus
• cannabis
• canvas
• canvass
• capacious
• capricious
• caracas
• carcass
• careless
• carelessness
• carolus
• catharsis
• caucasus
• caucus
• cautious
• cautiousness
• cavernous
• census
• ceraceous
• cetus
• cheapness
• childless
• chitinous
• chorus
• christmas
• circuitous
• circus
• cirrhosis
• cirrus
• citrus
• classless
• cleverness
• cloudless
• clueless
• clumsiness
• coccus
• cockiness
• cohesiveness
• coldness
• colorless
• colossus
• columbus
• combativeness
• compactness
• compass
• completeness
• confucius
• congress
• conscientious
• conscious
• consciousness
• consensus
• contagious
• contentious
• contentiousness
• contrariness
• coolness
• copernicus
• cordless
• cornwallis
• corpus
• correctness
• corvus
• countess
• countless
• courageous
• cowardice
• coziness
• craziness
• creativeness
• creditworthiness
• crevice
• crisis
• crispness
• crocus
• cronus
• crookedness
• curtis
• cuteness
• cutlass
• cygnus
• cypress
• cyprus
• cyrus
• cytomegalovirus
• daedalus
• dallas
• damascus
• darkness
• davis
• deaconess
• deadliness
• deafness
• decisiveness
• defenseless
• defensiveness
• degas
• delicious
• dermis
• desirous
• detritus
• dextrous
• diagnosis
• dialysis
• digitalis
• directionless
• directness
• disadvantageous
• disastrous
• discus
• disingenuousness
• disservice
• distinctiveness
• dizziness
• dominus
• doris
• doubtless
• douglas
• dreariness
• dreyfus
• drowsiness
• drunkenness
• dryness
• duchess
• ductless
• dulles
• dullness
• duplicitous
• eagerness
• earless
• earnestness
• edginess
• edifice
• effectiveness
• efficacious
• effortless
• egregious
• electrolysis
• elusiveness
• embarrass
• emeritus
• emphasis
• emptiness
• encephalitis
• encompass
• endless
• enormous
• eohippus
• epidermis
• erasmus
• esophagus
• estrous
• estrus
• eucalyptus
• evenness
• exodus
• exogenous
• expeditious
• eyeless
• eyewitness
• fabulous
• faceless
• facetious
• factitious
• faintness
• fairness
• fallacious
• famous
• farsightedness
• fastness
• fatherless
• fatuous
• faustus
• fearless
• featherless
• featureless
• felicitous
• ferocious
• ferrous
• fetus
• fibrosis
• fibrous
• fickleness
• fictitious
• firmness
• fitness
• flatness
• flawless
• flightless
• flirtatious
• focus
• fondness
• foolishness
• forcefulness
• forgiveness
• forthrightness
• fortress
• fortuitous
• foulness
• fracas
• fractious
• fractiousness
• frankness
• freshness
• frictionless
• frivolous
• fruitless
• fullness
• fungus
• funniness
• furnace
• gallus
• garrulous
• gastritis
• gauntness
• gayness
• gelatinous
• genesis
• genius
• gentleness
• genus
• ghastliness
• givenness
• gladiolus
• glottis
• gluttonous
• goddess
• godless
• goodness
• gorgeous
• governess
• graceless
• gracious
• graciousness
• gratis
• gratuitous
• gravitas
• greatness
• greenness
• grievous
• grimace
• grimness
• groundless
• guileless
• guinness
• gulyas
• gyrocompass
• hairiness
• hairless
• handedness
• hapless
• happiness
• hardness
• harmfulness
• harmless
• harness
• harquebus
• harshness
• hazardous
• headless
• headmistress
• heartless
• heinous
• heiress
• helpless
• helplessness
• hepatitis
• herbaceous
• heterogeneous
• heterozygous
• hiatus
• high-spiritedness
• highness
• hippopotamus
• hoarseness
• holiness
• homeless
• homelessness
• homeostasis
• homesickness
• homogenous
• homologous
• homozygous
• honduras
• hopeless
• hopelessness
• horace
• hornless
• horrendous
• horus
• hospice
• hostess
• hubris
• humanness
• humongous
• humorless
• humus
• hydrolysis
• hydrous
• hypnosis
• hypothesis
• ibis
• idleness
• idolatrous
• ignatius
• ignoramus
• illness
• impetuous
• impetus
• incestuous
• inconspicuous
• incredulous
• indecisiveness
• indigenous
• indus
• ineffectiveness
• inertness
• infamous
• infectious
• ingenious
• injudicious
• intravenous
• inventiveness
• iris
• isis
• isthmus
• janus
• jaundice
• jealous
• jesus
• jobless
• josephus
• judas
• judicious
• justice
• kansas
• keyless
• kindness
• kobus
• lactobacillus
• landless
• larcenous
• largess
• laryngitis
• lateness
• lattice
• lawless
• lawlessness
• laziness
• leafless
• legless
• lettuce
• libelous
• licentious
• lifeless
• lightheadedness
• lightness
• likeness
• limbless
• limitless
• listless
• litigious
• litmus
• liveliness
• locus
• loneliness
• loquacious
• lotus
• lousiness
• loveless
• low-spiritedness
• lucas
• luckless
• ludicrous
• luminous
• lupus
• lustrous
• madness
• madras
• magnanimous
• malice
• malicious
• malpractice
• mandamus
• marianas
• marquess
• marseilles
• marvelous
• mastoiditis
• mattress
• meaningless
• meanness
• meatless
• megalopolis
• meiosis
• membranous
• memphis
• menace
• meningitis
• merciless
• meritless
• metamorphosis
• meticulous
• metropolis
• midas
• mindless
• minus
• miraculous
• mischievous
• mistress
• momentous
• monogamous
• monotonous
• monstrous
• morphogenesis
• morris
• moses
• motionless
• mountainous
• mucous
• mucus
• multipurpose
• mutinous
• nablus
• nameless
• narcissus
• narrowness
• nastiness
• nauseous
• nautilus
• nearsightedness
• neatness
• nebulous
• necklace
• necropolis
• necrosis
• needless
• negus
• nephrosis
• nervous
• nervousness
• neurosis
• newness
• nexus
• niceness
• nicholas
• nicklaus
• niggardliness
• nimbus
• nitrogenous
• nitrous
• nonpoisonous
• nosiness
• nostradamus
• nothingness
• notice
• novice
• noxious
• numbness
• nutritious
• obnoxious
• odorless
• oedipus
• office
• ogress
• olympus
• ominous
• omnibus
• oneness
• onus
• openness
• opus
• orderliness
• orifice
• ostentatious
• osteoarthritis
• otherness
• outrageous
• outrageousness
• outspokenness
• overambitious
• overzealous
• oxalis
• painless
• palace
• pallas
• pandanus
• paralysis
• parnassus
• peacefulness
• pegasus
• pelvis
• pendulous
• penniless
• perilous
• permissiveness
• pernicious
• persepolis
• persuasiveness
• pettiness
• phoebus
• pilotless
• pincus
• pitiless
• playfulness
• plexus
• pocahontas
• pointless
• poisonous
• polaris
• politeness
• polyandrous
• polygamous
• polygynous
• pompous
• pompousness
• populace
• populous
• porous
• porpoise
• portentous
• possessiveness
• posthumous
• poultice
• powerless
• powerlessness
• practice
• preakness
• precious
• precipice
• precipitous
• precocious
• predaceous
• preface
• preparedness
• prestigious
• presumptuous
• pretentious
• priceless
• priestess
• primus
• proboscis
• prodigious
• prognosis
• promiscuous
• promise
• prophetess
• propitious
• prospectus
• psoriasis
• psychoanalysis
• psychokinesis
• psychosis
• pumice
• purchase
• purpose
• purposeless
• queasiness
• querulous
• quickness
• quietness
• raciness
• rambunctious
• ramus
• randomness
• raucous
• ravenous
• readiness
• reasonableness
• rebellious
• rebelliousness
• rebus
• reckless
• recklessness
• redness
• refocus
• regardless
• religious
• remorseless
• remoteness
• remus
• repetitious
• repurchase
• resourcefulness
• responsiveness
• restiveness
• restless
• restlessness
• restrictiveness
• resurface
• retrovirus
• rhesus
• richness
• ridiculous
• righteous
• righteousness
• rightness
• riotous
• riskiness
• riskless
• robustness
• romulus
• roominess
• rootless
• roughness
• rowdiness
• ruckus
• rudderless
• rudeness
• ruinous
• ruthless
• ruthlessness
• sadness
• salacious
• sameness
• sarcophagus
• scandalous
• scantiness
• sclerosis
• scoreless
• scrupulous
• scurrilous
• seamless
• sebaceous
• secretiveness
• seditious
• selfishness
• selfless
• semiprecious
• senseless
• sensitiveness
• sensuous
• separateness
• serendipitous
• seriousness
• service
• shakiness
• shallowness
• shameless
• shamus
• shapeless
• sharpness
• shortness
• shrewdness
• shyness
• sickness
• silliness
• sinuous
• sinus
• skinless
• skittishness
• slackness
• sleepiness
• sleepless
• sloppiness
• slovenliness
• slowness
• sluggishness
• slyness
• smallness
• smokeless
• smoothness
• smugness
• softness
• solace
• solicitous
• sorbus
• sorus
• soulless
• soundness
• spacious
• specious
• speechless
• spineless
• spiritedness
• spotless
• squeamishness
• stainless
• status
• steadfastness
• steepness
• stegosaurus
• sternness
• stewardess
• stiffness
• stillness
• stimulus
• stoutness
• strangeness
• stratus
• streptococcus
• stubbornness
• stupendous
• sturdiness
• stylus
• subconscious
• subsurface
• suddenness
• sumptuous
• superstitious
• surface
• surplus
• surreptitious
• suspicious
• sweetness
• swiftness
• syllabus
• symbiosis
• synonymous
• synthesis
• tantalus
• tardiness
• tarsus
• tartness
• tasteless
• tastiness
• taurus
• tenacious
• tendentious
• tenderness
• tennis
• tenuous
• terrace
• tetanus
• texas
• thalamus
• thankless
• thermos
• thesaurus
• thesis
• thetis
• thickness
• thomas
• thoroughness
• thrombosis
• tightness
• tigris
• timeless
• timeliness
• tireless
• titus
• togetherness
• toothless
• topless
• tortoise
• tortuous
• toughness
• treatise
• treeless
• trellis
• tremendous
• tremulous
• trustworthiness
• truthfulness
• typhus
• tyrannosaurus
• ubiquitous
• ugliness
• ulmus
• unambiguous
• unanimous
• unconscious
• unctuous
• uneasiness
• unfairness
• uniqueness
• unpleasantness
• unpretentious
• unscrupulous
• unwieldiness
• uranus
• ursus
• usefulness
• useless
• valueless
• vargas
• vastness
• venice
• venomous
• venous
• venus
• vexatious
• vicious
• villainous
• vindictiveness
• virus
• viscous
• vivacious
• vividness
• voiceless
• voluminous
• voluptuous
• voracious
• waitress
• wallace
• walrus
• wastefulness
• weakness
• weariness
• weightless
• weightlessness
• weirdness
• wellness
• wetness
• whiteness
• wholesomeness
• wickedness
• wilderness
• wildness
• willingness
• windlass
• wistfulness
• witless
• witness
• wonderfulness
• wondrous
• wordless
• worldliness
• worthless
• zealous