rile vs nark

rile is not a noun while nark is a noun.

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

As verbs, rile and nark are synonyms defined as:

rile and nark: cause annoyance in; disturb, especially by minor irritations

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

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

rile (verb)	nark (verb)
make turbid by stirring up the sediments of	inform or spy (for the police)
cause annoyance in; disturb, especially by minor irritations	cause annoyance in; disturb, especially by minor irritations