Synonyms of duffer

1 Syllable

dolt, klutz, clod, fool

2 Syllables

blockhead, botcher, spoiler, muddler, butcher, numskull, fumbler, bumblers, dunce, idiot, muddlers, muffer, donkey, bunglers, foul-up, bumbler, bungler, fumblers, goofball

3 Syllables

bonehead, harebrain, blunderer, addlebrain, featherbrain

4 Syllables

butterfingers, ignoramus, mismanager, incompetent