Is “Mizzenmast” a Scrabble word?
Yes
MIZZENMAST
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 Mizzenmast
/ˈmɪz.ənˌmɑːst/
noun
1.The aftmost mast on a ship having three or more masts.
2.The second mast of a ship having two masts where the second one is shorter, such as a ketch or yawl.
Synonyms: mizzen