bloodline vs parentage

bloodline and parentage both are nouns.

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

As nouns, bloodline and parentage are synonyms defined as:

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

bloodline (noun)	parentage (noun)
ancestry of a purebred animal	the hereditary derivation of an individual
the hereditary derivation of an individual	the kinship relation of an offspring to the parents
	the state of being a parent