Synonyms for lessen Found 5 synonyms across 3 meanings for “lessen”. decrease in size, extent, or range (verb) decreasediminishfall make smaller (verb) minify wear off or die down (verb) subside Explore Related Words Rhymes with lessenSynonyms for decreaseSynonyms for diminishSynonyms for fallSynonyms for minifySynonyms for subside Synonym Finder | Rhyme Finder | Poetry Editor