library catalog vs American spelling

library catalog and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
library catalog	Yes	No	No	No
American spelling	Yes	No	No	No

library catalog (noun)	American spelling (noun)
an enumeration of all the resources of a library	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')