British spelling vs overutilisation

British spelling and overutilisation both are nouns.

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

British spelling (noun)	overutilisation (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	exploitation to the point of diminishing returns