vocalism vs vocalisation

vocalism and vocalisation both are nouns.

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

As nouns, vocalism and vocalisation are synonyms defined as:

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

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

vocalism (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 system of vowels used in a particular language