descent vs stemma

descent and stemma both are nouns.

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

As nouns, descent and stemma are synonyms defined as:

descent (noun)	stemma (noun)
the act of changing your location in a downward direction	an eye having a single lens
properties attributable to your ancestry	the hereditary derivation of an individual
a movement downward	a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work
the hereditary derivation of an individual
a downward slope or bend
the kinship relation between an individual and the individual's progenitors