nauseous vs offensive

nauseous is not a noun while offensive is a noun.

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

As adjectives, nauseous and offensive are synonyms defined as:

Other synonyms of nauseous include loathsome, nauseating, noisome, queasy, sickening, vile.

nauseous (noun)	offensive (noun)
	the action of attacking an enemy

nauseous (adjective)	offensive (adjective)
feeling nausea; feeling about to vomit	unpleasant or disgusting especially to the senses
causing or able to cause nausea	causing anger or annoyance
	for the purpose of attack rather than defense
	morally offensive
	violating or tending to violate or offend against
	causing or able to cause nausea