adenoidal vs nasal

adenoidal is not a noun while nasal is a noun.

Word	Noun	Adjective	Verb	Adverb
adenoidal	No	Yes	No	No
nasal	Yes	Yes	No	No

As adjectives, adenoidal and nasal are synonyms defined as:

Other synonyms of adenoidal include pinched.

adenoidal (noun)	nasal (noun)
	an elongated rectangular bone that forms the bridge of the nose
	a consonant produced through the nose with the mouth closed

adenoidal (adjective)	nasal (adjective)
of or pertaining to the adenoids	of or in or relating to the nose
sounding as if the nose were pinched	sounding as if the nose were pinched