sulfur vs American spelling

sulfur and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfur	Yes	No	Yes	No
American spelling	Yes	No	No	No

sulfur (noun)	American spelling (noun)
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)	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

sulfur (verb)	American spelling (verb)
treat with sulphur in order to preserve