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Noun: dunderhead  'dún-dur`hed
  1. A stupid person; used to express a low opinion of someone's intelligence
    - dunce, numskull, blockhead, bonehead, lunkhead [N. Amer], hammerhead, knucklehead, loggerhead, muttonhead, dumbass [N. Amer], chowderhead [N. Amer], lamebrain, pea brain, numbskull, twonk [Brit], lunk [N. Amer]

Derived forms: dunderheads

Type of: dolt, dullard, poor fish, pudden-head [US], pudding head, stupe, stupid, stupid person

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Duncan James Corrow Grant
dunce
dunce cap
dunce's cap
duncical
duncish
dun-colored
dun-coloured
dundathu pine
Dundee
dunderhead
dune
dune buggy
dune cycling
dung
dung beetle
dungaree
Dungeness crab
dungeon
dunghill
dungy