achromatise vs British spelling

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

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

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

achromatise (verb)	British spelling (verb)
remove color from