Is “Mackinaw” a Scrabble word?
Yes
MACKINAW
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 Mackinaw
/ˈmakɪnɔː/
noun
1.A heavy woolen cloth.
2.A blanket made of wool, formerly distributed to the Amerindians by the U.S. government.
3.A flat-bottomed cargo boat; mackinaw boat.