indecisiveness vs doubt

indecisiveness and doubt both are nouns.

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

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

indecisiveness: doubt concerning two or more possible alternatives or courses of action
doubt: the state of being unsure of something

Other hypernyms of indecisiveness include doubtfulness, dubiety, dubiousness, incertitude, uncertainty.

indecisiveness (noun)	doubt (noun)
the trait of irresolution; a lack of firmness of character or purpose	uncertainty about the truth or factuality or existence of something
doubt concerning two or more possible alternatives or courses of action	the state of being unsure of something

indecisiveness (verb)	doubt (verb)
	consider unlikely
	lack confidence in