pedigree vs line of descent

pedigree and line of descent both are nouns.

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

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

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

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

pedigree (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
line of descent of a purebred animal

pedigree (adjective)	line of descent (adjective)
having a list of ancestors as proof of being a purebred animal