Is “Outer” a Scrabble word?
Yes
OUTER
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 Outer
/ˈaʊtə/
noun
1.An outer part.
2.The 4th circle on a target, outside the inner and magpie.
3.A shot which strikes the outer of a target.
adjective
1.Outside; external.
2.Farther from the centre of the inside.