bilateral descent vs filiation

bilateral descent and filiation both are nouns.

Word	Noun	Adjective	Verb	Adverb
bilateral descent	Yes	No	No	No
filiation	Yes	No	No	No

As nouns, filiation is a hypernym of bilateral descent; that is, filiation is a word with a broader meaning than bilateral descent:

bilateral descent: line of descent traced through both the maternal and paternal sides of the family
filiation: the kinship relation between an individual and the individual's progenitors

Other hypernyms of bilateral descent include descent, line of descent, lineage.

bilateral descent (noun)	filiation (noun)
line of descent traced through both the maternal and paternal sides of the family	inherited properties shared with others of your bloodline
	the kinship relation between an individual and the individual's progenitors