patrilineal kin vs patrilineal sib

patrilineal kin and patrilineal sib both are nouns.

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

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

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

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