nauseate vs nausea

nauseate is not a noun while nausea is a noun.

Word	Noun	Adjective	Verb	Adverb
nauseate	No	No	Yes	No
nausea	Yes	No	No	No

nauseate (noun)	nausea (noun)
	disgust so strong it makes you feel sick
	the state that precedes vomiting

nauseate (verb)	nausea (verb)
cause aversion in; offend the moral sense of
upset and make nauseated