overutilisation vs British spelling

overutilisation and British spelling both are nouns.

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

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