choana vs posterior nasal aperture

choana and posterior nasal aperture both are nouns.

Word	Noun	Adjective	Verb	Adverb
choana	Yes	No	No	No
posterior nasal aperture	Yes	No	No	No

As nouns, choana and posterior nasal aperture are synonyms defined as:

choana and posterior nasal aperture: either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx

Other synonyms of choana include internal nostril.

choana (noun)	posterior nasal aperture (noun)
either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx	either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx