skin eruption vs exanthema

skin eruption and exanthema both are nouns.

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

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

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

Other synonyms of skin eruption include exanthem.

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