cross-fertilise vs British spelling

cross-fertilise is not a noun while British spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
cross-fertilise	No	No	Yes	No
British spelling	Yes	No	No	No

cross-fertilise (noun)	British spelling (noun)
	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

cross-fertilise (verb)	British spelling (verb)
cause to undergo cross-fertilization
undergo cross-fertilization; become fertile