destabilization vs destabilisation

destabilization and destabilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
destabilization	Yes	No	No	No
destabilisation	Yes	No	No	No

As nouns, destabilization and destabilisation are synonyms defined as:

destabilization and destabilisation: the action of destabilizing; making something less stable (especially of a government or country or economy)

destabilization (noun)	destabilisation (noun)
the action of destabilizing; making something less stable (especially of a government or country or economy)	the action of destabilizing; making something less stable (especially of a government or country or economy)
an event that causes a loss of equilibrium (as of a ship or aircraft)