DELETERIOUS /ˌdɛlɪˈtɪəɹi.əs/ ► audio Scrabble 12 Words With Friends 14 Definition adjective harmful to living things. — synonyms: hurtful, injurious Examples “deleterious effects” See all 767 words you can make from DELETERIOUS → 11-letter words Words starting with D Words ending with S ← Unscramble different letters