Yes, KINSHIP is a Scrabble word!

Letter values in Scrabble US: K 5, I 1, N 1, S 1, H 4, I 1, P 3.

Is it a valid word?

KINSHIP is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a close connection marked by community of interests or similarity in nature or character
(anthropology) relatedness or connection by blood or marriage or adoption

Also: family relationship.