matrilineal sib vs matrikin

matrilineal sib and matrikin both are nouns.

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

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

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

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