Big Huge Thesaurus

effectual

adjective

• effective
• efficacious
• legal
• sound

antonyms

• ineffective

related terms

• efficacious
• efficient
• potent
• powerful
• stiff
• strong
• useful
• utile

similar terms

• hard-hitting
• impelling
• impressive
• rough-and-ready
• telling
• trenchant
• valid

sounds kind of like

• effectually
• epistle