herpes zoster vs herpes zoster virus

herpes zoster and herpes zoster virus both are nouns.

Word	Noun	Adjective	Verb	Adverb
herpes zoster	Yes	No	No	No
herpes zoster virus	Yes	No	No	No

As nouns, herpes zoster and herpes zoster virus are synonyms defined as:

herpes zoster and herpes zoster virus: a herpes virus that causes shingles

herpes zoster (noun)	herpes zoster virus (noun)
a herpes virus that causes shingles	a herpes virus that causes shingles
eruptions along a nerve path often accompanied by severe neuralgia