Is “Slayer” a Scrabble word?
Yes
SLAYER
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 Slayer
/ˈsleɪə/
noun
1.A killer; a murderer; someone who slays