GADFLY /ˈɡædflaɪ/ ► audio Scrabble 14 Words With Friends 15 Definition noun a persistently annoying person. — synonyms: pest, blighter, cuss, pesterer noun any of various large flies that annoy livestock. Examples “He's a regular gadfly and takes advantage of his friend's generosity.” See all 28 words you can make from GADFLY → 6-letter words Words starting with G Words ending with Y ← Unscramble different letters