stemma vs line of descent

stemma and line of descent both are nouns.

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

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

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

stemma (noun)	line of descent (noun)
an eye having a single lens	the hereditary derivation of an individual
the hereditary derivation of an individual	the kinship relation between an individual and the individual's progenitors
a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work