brimstone vs atomic number 16

brimstone and atomic number 16 both are nouns.

Word	Noun	Adjective	Verb	Adverb
brimstone	Yes	No	No	No
atomic number 16	Yes	No	No	No

As nouns, atomic number 16 is a hypernym of brimstone; that is, atomic number 16 is a word with a broader meaning than brimstone:

brimstone: an old name for sulfur
atomic number 16: an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)

Other hypernyms of brimstone include S, sulfur, sulphur.

brimstone (noun)	atomic number 16 (noun)
an old name for sulfur	an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)