increase 21 antonyms and opposites of increase. Verb — To become larger in amount, number, or degree. Synonyms for increase wax go up grow soar shoot up greaten raise up accelerate accrue aggrandize augment embiggen enhance enlarge heighten swell wind up rise increment uptick acquisition expansion Antonyms for increase decrease drop fall go down plummet plunge reduce shrink sink cut decrement lower wane contract lessen loss lowering reduction shrinkage decline diminishment ← Back to the full definition of increase
