matrilineal kin vs matrilineal sib

matrilineal kin and matrilineal sib both are nouns.

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

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

Other synonyms of matrilineal kin include enate, matrikin, matrisib.

matrilineal kin (noun)	matrilineal sib (noun)
one related on the mother's side	one related on the mother's side