sickish vs nauseated

sickish and nauseated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sickish	No	Yes	No	No
nauseated	No	Yes	No	No

As adjectives, sickish and nauseated are synonyms defined as:

Other synonyms of sickish include nauseous, queasy, sick.

sickish (adjective)	nauseated (adjective)
feeling nausea; feeling about to vomit	feeling nausea; feeling about to vomit