Antonyms for "necessary" (26 found)

csneededsuperfluousswapswap csunneededuseless

Adjective(19 words)

casualcircumstantialcontingentevitablefacultativeimmaterialimpossibleincidentalnonessentialnonobligatenonobligatorynonrequisitenothingburgeromissibleoptionalotiosepettysimpleunnecessary

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.