skin eruption vs exanthem

skin eruption and exanthem both are nouns.

Word	Noun	Adjective	Verb	Adverb
skin eruption	Yes	No	No	No
exanthem	Yes	No	No	No

As nouns, skin eruption and exanthem are synonyms defined as:

skin eruption and exanthem: eruption on the skin occurring as a symptom of a disease

Other synonyms of skin eruption include exanthema.

skin eruption (noun)	exanthem (noun)
eruption on the skin occurring as a symptom of a disease	eruption on the skin occurring as a symptom of a disease