nauseating vs sickening

nauseating and sickening both are adjectives.

Word	Noun	Adjective	Verb	Adverb
nauseating	No	Yes	No	No
sickening	No	Yes	No	No

As adjectives, nauseating and sickening are synonyms defined as:

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

nauseating (adjective)	sickening (adjective)
causing or able to cause nausea	causing or able to cause nausea