vacillation vs indecision

vacillation and indecision both are nouns.

Word	Noun	Adjective	Verb	Adverb
vacillation	Yes	No	No	No
indecision	Yes	No	No	No

As nouns, indecision is a hypernym of vacillation; that is, indecision is a word with a broader meaning than vacillation:

vacillation: indecision in speech or action
indecision: doubt concerning two or more possible alternatives or courses of action

Other hypernyms of vacillation include indecisiveness, irresolution.

vacillation (noun)	indecision (noun)
changing location by moving back and forth	the trait of irresolution; a lack of firmness of character or purpose
indecision in speech or action	doubt concerning two or more possible alternatives or courses of action