British spelling vs self-fertilisation

British spelling and self-fertilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
self-fertilisation	Yes	No	No	No

British spelling (noun)	self-fertilisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	fertilization by the union of male and female gametes from the same individual