Is “Missive” a Scrabble word?
Yes
MISSIVE
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 Missive
/ˈmɪsɪv/
noun
1.A written message; a letter, note or memo.
2.(in the plural) Letters sent between two parties in which one makes an offer and the other accepts it.
3.One who is sent; a messenger.
adjective
1.Specially sent; intended or prepared to be sent.
“a letter missive”
2.Serving as a missile; intended to be thrown.