American spelling vs ruggedization

American spelling and ruggedization both are nouns.

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

American spelling (noun)	ruggedization (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	the act of making a piece of equipment rugged (strengthening to resist wear or abuse)