DUMFOUNDED Scrabble 18 Words With Friends 22 Definition adjective as if struck dumb with astonishment and surprise. — synonyms: dumbfounded, flabbergasted, stupefied, thunderstruck, dumbstruck, dumbstricken See all 102 words you can make from DUMFOUNDED → 10-letter words Words starting with D Words ending with D ← Unscramble different letters