63 words with U, M
Filter answers for the "um" by length:
Length times width e.g.
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A
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R
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E
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A
Hint 1 meaning
The superficial contents of any figure; the surface included
within any given lines; superficial extent; as, the area of a square or
a triangle.
Hint 2 anagram
AARE
Hint 3 another clue
CERTAIN BRAIN SIZE
12 +2