get under one's skin vs rile

get under one's skin and rile both are verbs.

Word	Noun	Adjective	Verb	Adverb
get under one's skin	No	No	Yes	No
rile	No	No	Yes	No

As verbs, rile is a hypernym of get under one's skin; that is, rile is a word with a broader meaning than get under one's skin:

Other hypernyms of get under one's skin include annoy, bother, chafe, devil, get at, get to, gravel, irritate, nark, nettle, rag, vex.

get under one's skin (verb)	rile (verb)
irritate	make turbid by stirring up the sediments of
	cause annoyance in; disturb, especially by minor irritations