chevvy vs nark

chevvy is not a noun while nark is a noun.

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

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

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

chevvy (noun)	nark (noun)
	an informer or spy working for the police
	a lawman concerned with narcotics violations

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