dehumanization vs dehumanisation

dehumanization and dehumanisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
dehumanization	Yes	No	No	No
dehumanisation	Yes	No	No	No

As nouns, dehumanization and dehumanisation are synonyms defined as:

dehumanization and dehumanisation: the act of degrading people with respect to their best qualities

dehumanization (noun)	dehumanisation (noun)
the act of degrading people with respect to their best qualities	the act of degrading people with respect to their best qualities