Is “Inion” a Scrabble word?
Yes
INION
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 Inion
noun
1.A small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance.