posterior nasal aperture vs choana

posterior nasal aperture and choana both are nouns.

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

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

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

Other synonyms of posterior nasal aperture include internal nostril.

posterior nasal aperture (noun)	choana (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