sprechgesang vs vocalism

sprechgesang and vocalism both are nouns.

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

As nouns, vocalism is a hypernym of sprechgesang; that is, vocalism is a word with a broader meaning than sprechgesang:

sprechgesang: a style of dramatic vocalization between singing and speaking
vocalism: the sound made by the vibration of vocal folds modified by the resonance of the vocal tract

Other hypernyms of sprechgesang include phonation, vocalisation, vocalization, voice, vox.

sprechgesang (noun)	vocalism (noun)
a style of dramatic vocalization between singing and speaking	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