American spelling vs ruggedize

American spelling is a noun but ruggedize is not a noun.

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

American spelling (noun)	ruggedize (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')

American spelling (verb)	ruggedize (verb)
	produce in a version designed to withstand rough usage