overutilisation vs overutilization

overutilisation and overutilization both are nouns.

Word	Noun	Adjective	Verb	Adverb
overutilisation	Yes	No	No	No
overutilization	Yes	No	No	No

As nouns, overutilisation and overutilization are synonyms defined as:

overutilisation and overutilization: exploitation to the point of diminishing returns

Other synonyms of overutilisation include overexploitation, overuse.

overutilisation (noun)	overutilization (noun)
exploitation to the point of diminishing returns	exploitation to the point of diminishing returns