offensive vs noisome

offensive is a noun but noisome is not a noun.

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

As adjectives, offensive and noisome are synonyms defined as:

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

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

offensive (adjective)	noisome (adjective)
unpleasant or disgusting especially to the senses	offensively malodorous
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