KNUCKLEHEADED
Scrabble letter values: K5N1U1C3K5L1E1H4E1A1D2E1D2 = 28
Definition
KNUCKLEHEADED is the past tense of KNUCKLEHEAD.
noun KNUCKLEHEAD: a stupid person.
Synonyms of KNUCKLEHEAD: dunce, dunderhead, numskull, blockhead, bonehead, lunkhead, hammerhead, loggerhead