American spelling vs sterilize

American spelling is a noun but sterilize is not a noun.

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

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

American spelling (verb)	sterilize (verb)
	make infertile
	make free from bacteria