American spelling vs cross-fertilize

American spelling is a noun but cross-fertilize is not a noun.

Word	Noun	Adjective	Verb	Adverb
American spelling	Yes	No	No	No
cross-fertilize	No	No	Yes	No

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

American spelling (verb)	cross-fertilize (verb)
	cause to undergo cross-fertilization
	undergo cross-fertilization; become fertile