rile vs gravel

rile is not a noun while gravel is a noun.

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

As verbs, rile and gravel are synonyms defined as:

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

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

rile (noun)	gravel (noun)
	rock fragments and pebbles

rile (verb)	gravel (verb)
make turbid by stirring up the sediments of	be a mystery or bewildering to
cause annoyance in; disturb, especially by minor irritations	cover with gravel
	cause annoyance in; disturb, especially by minor irritations