blood kinship vs kinship

blood kinship and kinship both are nouns.

Word	Noun	Adjective	Verb	Adverb
blood kinship	Yes	No	No	No
kinship	Yes	No	No	No

As nouns, kinship is a hypernym of blood kinship; that is, kinship is a word with a broader meaning than blood kinship:

blood kinship: (anthropology) the condition of being related by blood
kinship: (anthropology) relatedness or connection by blood or marriage or adoption

Other hypernyms of blood kinship include family relationship, relationship.

blood kinship (noun)	kinship (noun)
(anthropology) the condition of being related by blood	(anthropology) relatedness or connection by blood or marriage or adoption
	a close connection marked by community of interests or similarity in nature or character