yodel vs vociferation

yodel and vociferation both are nouns.

Word	Noun	Adjective	Verb	Adverb
yodel	Yes	No	Yes	No
vociferation	Yes	No	No	No

As nouns, vociferation is a hypernym of yodel; that is, vociferation is a word with a broader meaning than yodel:

yodel: a songlike cry in which the voice fluctuates rapidly between the normal voice and falsetto
vociferation: a loud utterance; often in protest or opposition

Other hypernyms of yodel include call, cry, outcry, shout, yell.

yodel (noun)	vociferation (noun)
a songlike cry in which the voice fluctuates rapidly between the normal voice and falsetto	a loud utterance; often in protest or opposition

yodel (verb)	vociferation (verb)
sing by changing register; sing by yodeling