troublesomeness vs difficulty

troublesomeness and difficulty both are nouns.

Word	Noun	Adjective	Verb	Adverb
troublesomeness	Yes	No	No	No
difficulty	Yes	No	No	No

As nouns, difficulty is a hypernym of troublesomeness; that is, difficulty is a word with a broader meaning than troublesomeness:

troublesomeness: a difficulty that causes anxiety
difficulty: the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result

Other hypernyms of troublesomeness include difficultness.

troublesomeness (noun)	difficulty (noun)
a difficulty that causes anxiety	an effort that is inconvenient
	the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result