DEFICIENCY /dɪˈfɪʃənsi/ Scrabble 21 Words With Friends 23 Definition noun the state of needing something that is absent or unavailable. — synonyms: lack, want noun lack of an adequate quantity or number. — synonyms: insufficiency, inadequacy See all 79 words you can make from DEFICIENCY → 10-letter words Words starting with D Words ending with Y ← Unscramble different letters