tidbit vs American spelling

tidbit and American spelling both are nouns.

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

tidbit (noun)	American spelling (noun)
a small tasty bit of food	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')