sprechstimme vs sprechgesang

sprechstimme and sprechgesang both are nouns.

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

As nouns, sprechstimme and sprechgesang are synonyms defined as:

sprechstimme and sprechgesang: a style of dramatic vocalization between singing and speaking

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