Is “Onanism” a Scrabble word?
Yes
ONANISM
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 Onanism
/ˈəʊnəˌnɪzəm/
noun
1.Masturbation.
2.Ejaculating outside the vagina during intercourse; (the performing of) coitus interruptus.