euthanise vs British spelling

euthanise is not a noun while British spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
euthanise	No	No	Yes	No
British spelling	Yes	No	No	No

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

euthanise (verb)	British spelling (verb)
intentionally cause the painless death of a person or animal