hesitation vs indecisiveness

hesitation and indecisiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
hesitation	Yes	No	No	No
indecisiveness	Yes	No	No	No

As nouns, indecisiveness is a hypernym of hesitation; that is, indecisiveness is a word with a broader meaning than hesitation:

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

Other hypernyms of hesitation include indecision, irresolution.

hesitation (noun)	indecisiveness (noun)
the act of pausing uncertainly	the trait of irresolution; a lack of firmness of character or purpose
a certain degree of unwillingness	doubt concerning two or more possible alternatives or courses of action
indecision in speech or action