parentage vs descent

parentage and descent both are nouns.

Word	Noun	Adjective	Verb	Adverb
parentage	Yes	No	No	No
descent	Yes	No	No	No

As nouns, parentage and descent are synonyms defined as:

Other synonyms of parentage include ancestry, blood, blood line, bloodline, line, line of descent, lineage, origin, pedigree, stemma, stock.

parentage (noun)	descent (noun)
the hereditary derivation of an individual	the act of changing your location in a downward direction
the kinship relation of an offspring to the parents	properties attributable to your ancestry
the state of being a parent	a movement downward
	the hereditary derivation of an individual
	a downward slope or bend
	the kinship relation between an individual and the individual's progenitors