Is “Bighead” a Scrabble word?
Yes
BIGHEAD
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Bighead
/ˈbɪɡˌhɛd/
noun
1.(especially used by children) A person having an inflated opinion of himself; a conceited or arrogant person.
2.One of several species of fish having a large head.
3.One of several animal diseases that cause swelling of the head.