Big Huge Thesaurus

clam up

verb

• close up
• dummy up
• shut up
• belt up
• button up
• be quiet
• keep mum

antonyms

• open up

sounds kind of like

• c-clamp
• clamp
• clean up
• cleanup
• climb
• climb up
• clomp
• clump
• colombia
• colombo
• columba
• columbia
• columbo
• coulomb