parentage vs bloodline

parentage and bloodline both are nouns.

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

As nouns, parentage and bloodline are synonyms defined as:

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

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