brimstone vs native sulfur

brimstone and native sulfur both are nouns.

Word	Noun	Adjective	Verb	Adverb
brimstone	Yes	No	No	No
native sulfur	Yes	No	No	No

As nouns, brimstone and native sulfur are synonyms defined as:

Other synonyms of brimstone include native sulphur.

brimstone (noun)	native sulfur (noun)
an old name for sulfur	an old name for sulfur