Is “Mores” a Scrabble word?
Yes
MORES
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 Mores
/ˈmɔː.ɹeɪz/
noun
1.A set of moral norms or customs derived from generally accepted practices rather than written laws.