Synonyms for loosen Found 6 synonyms across 4 meanings for “loosen”. make loose or looser (verb) loose make less severe or strict (verb) relax disentangle and raise the fibers of (verb) tease cause to become loose (verb) untieundo Explore Related Words Rhymes with loosenSynonyms for looseSynonyms for relaxSynonyms for teaseSynonyms for untieSynonyms for undo Synonym Finder | Rhyme Finder | Poetry Editor