hassle vs nark

hassle and nark both are nouns.

Word	Noun	Adjective	Verb	Adverb
hassle	Yes	No	Yes	No
nark	Yes	No	Yes	No

As verbs, nark is a hypernym of hassle; that is, nark is a word with a broader meaning than hassle:

Other hypernyms of hassle include annoy, bother, chafe, devil, get at, get to, gravel, irritate, nettle, rag, rile, vex.

hassle (noun)	nark (noun)
disorderly fighting	an informer or spy working for the police
an angry disturbance	a lawman concerned with narcotics violations

hassle (verb)	nark (verb)
annoy continually or chronically	inform or spy (for the police)
	cause annoyance in; disturb, especially by minor irritations