bloodline vs line of descent

bloodline and line of descent both are nouns.

Word	Noun	Adjective	Verb	Adverb
bloodline	Yes	No	No	No
line of descent	Yes	No	No	No

As nouns, bloodline and line of descent are synonyms defined as:

bloodline and line of descent: the hereditary derivation of an individual

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

bloodline (noun)	line of descent (noun)
ancestry of a purebred animal	the hereditary derivation of an individual
the hereditary derivation of an individual	the kinship relation between an individual and the individual's progenitors