vocalization vs vocalisation

vocalization and vocalisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
vocalization	Yes	No	No	No
vocalisation	Yes	No	No	No

As nouns, vocalization and vocalisation are synonyms defined as:

vocalization and vocalisation: the sound made by the vibration of vocal folds modified by the resonance of the vocal tract

Other synonyms of vocalization include phonation, vocalism, voice, vox.

vocalization (noun)	vocalisation (noun)
the sound made by the vibration of vocal folds modified by the resonance of the vocal tract	the sound made by the vibration of vocal folds modified by the resonance of the vocal tract
the use of uttered sounds for auditory communication