tumor vs American spelling

tumor and American spelling both are nouns.

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

tumor (noun)	American spelling (noun)
an abnormal new mass of tissue that serves no purpose	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')