stemma vs optic

stemma and optic both are nouns.

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

As nouns, optic is a hypernym of stemma; that is, optic is a word with a broader meaning than stemma:

Other hypernyms of stemma include eye, oculus.

stemma (noun)	optic (noun)
an eye having a single lens	the organ of sight
the hereditary derivation of an individual
a tree diagram showing a reconstruction of the transmission of manuscripts of a literary work

stemma (adjective)	optic (adjective)
	of or relating to or resembling the eye
	relating to or using sight