cognation vs kinship

cognation and kinship both are nouns.

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

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

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

Other hypernyms of cognation include family relationship, relationship.

cognation (noun)	kinship (noun)
(anthropology) the condition of being related by blood	(anthropology) relatedness or connection by blood or marriage or adoption
line of descent traced through the maternal side of the family	a close connection marked by community of interests or similarity in nature or character