fenestra vs orifice

fenestra and orifice both are nouns.

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

As nouns, orifice is a hypernym of fenestra; that is, orifice 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)
orifice: an aperture or hole that opens into a bodily cavity

Other hypernyms of fenestra include opening, porta.

fenestra (noun)	orifice (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