Is “Mansion” a Scrabble word?
Yes
MANSION
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 Mansion
/ˈmæn(t)ʃən/
noun
1.A large house or building, usually built for the wealthy.
2.A luxurious flat (apartment).
3.A house provided for a clergyman; a manse.