introitus vs porta

introitus and porta both are nouns.

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

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

introitus: entrance or opening to a hollow organ or tube (especially the vaginal opening)
porta: an aperture or hole that opens into a bodily cavity

Other hypernyms of introitus include opening, orifice.

introitus (noun)	porta (noun)
entrance or opening to a hollow organ or tube (especially the vaginal opening)	an aperture or hole that opens into a bodily cavity