Synonyms for RELAX: chill, unwind, rest, decompress, bask, loosen up, hang loose, de-stress; Antonyms of RELAX: tense (up), tension, stretch, tighten, tense, strain, bind, attach

Synonyms for RELAX: slacken, loosen, ease, slack, loose, unbend, let up, abate, clam, diminish, divert, idle, languish, lessen, bend; Antonyms for RELAX: tense, excite, agitate, tighten, worry, increase, grow.

rest, unwind, sit back, take it easy (informal), chill (slang), chill out (slang), decompress, hang loose (slang), lie down, take a breather (informal), take a break, loosen up, be at ease, repose, recline, loaf, sit around, settle back, make yourself at home, stop work, take five (slang), let your hair down (slang), take a load off (slang), kick back (slang), put your feet up (informal)