cross-fertilize vs American spelling

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

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

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

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