indecision vs doubtfulness

indecision and doubtfulness both are nouns.

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

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

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

Other hypernyms of indecision include doubt, dubiety, dubiousness, incertitude, uncertainty.

indecision (noun)	doubtfulness (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