LUNKHEADED
Scrabble letter values: L1U1N1K5H4E1A1D2E1D2 = 19
Definition
LUNKHEADED is the past tense of LUNKHEAD.
noun LUNKHEAD: a stupid person.
Synonyms of LUNKHEAD: dunce, dunderhead, numskull, blockhead, bonehead, hammerhead, knucklehead, loggerhead