fenestra vs porta

fenestra and porta both are nouns.

Word	Noun	Adjective	Verb	Adverb
fenestra	Yes	No	No	No
porta	Yes	No	No	No

As nouns, porta is a hypernym of fenestra; that is, porta is a word with a broader meaning than fenestra:

fenestra: a small opening covered with membrane (especially one in the bone between the middle and inner ear)
porta: an aperture or hole that opens into a bodily cavity

Other hypernyms of fenestra include opening, orifice.

fenestra (noun)	porta (noun)
a small opening covered with membrane (especially one in the bone between the middle and inner ear)	an aperture or hole that opens into a bodily cavity