American spelling vs initialization

American spelling and initialization both are nouns.

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

American spelling (noun)	initialization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	(computer science) the format of sectors on the surface of a hard disk drive so that the operating system can access them and setting a starting position