overutilization vs overutilisation

overutilization and overutilisation both are nouns.

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

As nouns, overutilization and overutilisation are synonyms defined as:

overutilization and overutilisation: exploitation to the point of diminishing returns

Other synonyms of overutilization include overexploitation, overuse.

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