devil vs troubler

devil and troubler both are nouns.

Word	Noun	Adjective	Verb	Adverb
devil	Yes	No	Yes	No
troubler	Yes	No	No	No

As nouns, troubler is a hypernym of devil; that is, troubler is a word with a broader meaning than devil:

Other hypernyms of devil include bad hat, mischief-maker, trouble maker, troublemaker.

devil (noun)	troubler (noun)
a word used in exclamations of confusion	someone who deliberately stirs up trouble
an evil supernatural being
a cruel wicked and inhuman person
a rowdy or mischievous person (usually a young man)

devil (verb)	troubler (verb)
coat or stuff with a spicy paste
cause annoyance in; disturb, especially by minor irritations