offensive vs nauseous

offensive is a noun but nauseous is not a noun.

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

As adjectives, offensive and nauseous are synonyms defined as:

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

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

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