specialty vs American spelling

specialty and American spelling both are nouns.

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

specialty (noun)	American spelling (noun)
the special line of work you have adopted as your career	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
a distinguishing trait
an asset of special worth or utility