nauseated vs nauseous

nauseated and nauseous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nauseated	No	Yes	No	No
nauseous	No	Yes	No	No

As adjectives, nauseated and nauseous are synonyms defined as:

Other synonyms of nauseated include queasy, sick, sickish.

nauseated (adjective)	nauseous (adjective)
feeling nausea; feeling about to vomit	feeling nausea; feeling about to vomit
	causing or able to cause nausea