destabilisation vs destabilization

destabilisation and destabilization both are nouns.

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

As nouns, destabilisation and destabilization are synonyms defined as:

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

destabilisation (noun)	destabilization (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)