eczema herpeticum vs eczema

eczema herpeticum and eczema both are nouns.

Word	Noun	Adjective	Verb	Adverb
eczema herpeticum	Yes	No	No	No
eczema	Yes	No	No	No

As nouns, eczema is a hypernym of eczema herpeticum; that is, eczema is a word with a broader meaning than eczema herpeticum:

eczema herpeticum: eczema characterized by a feverish condition and widespread eruption of vesicles; most common in children
eczema: generic term for inflammatory conditions of the skin; particularly with vesiculation in the acute stages

eczema herpeticum (noun)	eczema (noun)
eczema characterized by a feverish condition and widespread eruption of vesicles; most common in children	generic term for inflammatory conditions of the skin; particularly with vesiculation in the acute stages