troubler vs devil

troubler and devil both are nouns.

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

As nouns, devil is a hyponym of troubler; that is, devil is a word with a more specific, narrower meaning than troubler:

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

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