filiation vs ancestry

filiation and ancestry both are nouns.

Word	Noun	Adjective	Verb	Adverb
filiation	Yes	No	No	No
ancestry	Yes	No	No	No

As nouns, filiation and ancestry are synonyms defined as:

filiation and ancestry: inherited properties shared with others of your bloodline

Other synonyms of filiation include derivation, lineage.

filiation (noun)	ancestry (noun)
inherited properties shared with others of your bloodline	inherited properties shared with others of your bloodline
the kinship relation between an individual and the individual's progenitors	the hereditary derivation of an individual