shingles vs zoster

shingles and zoster both are nouns.

Word	Noun	Adjective	Verb	Adverb
shingles	Yes	No	No	No
zoster	Yes	No	No	No

As nouns, shingles and zoster are synonyms defined as:

shingles and zoster: eruptions along a nerve path often accompanied by severe neuralgia

Other synonyms of shingles include herpes zoster.

shingles (noun)	zoster (noun)
eruptions along a nerve path often accompanied by severe neuralgia	eruptions along a nerve path often accompanied by severe neuralgia