patrilineal kin vs patrikin

patrilineal kin and patrikin both are nouns.

Word	Noun	Adjective	Verb	Adverb
patrilineal kin	Yes	No	No	No
patrikin	Yes	No	No	No

As nouns, patrilineal kin and patrikin are synonyms defined as:

Other synonyms of patrilineal kin include agnate, patrilineal sib, patrisib.

patrilineal kin (noun)	patrikin (noun)
one related on the father's side	one related on the father's side