loathsome vs nauseous

loathsome and nauseous both are adjectives.

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

As adjectives, loathsome and nauseous are synonyms defined as:

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

loathsome (adjective)	nauseous (adjective)
highly offensive; arousing aversion or disgust	feeling nausea; feeling about to vomit
causing or able to cause nausea	causing or able to cause nausea