gravel vs rile

gravel is a noun but rile is not a noun.

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

As verbs, gravel and rile are synonyms defined as:

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

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

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

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