bedevil vs gravel

bedevil is not a noun while gravel is a noun.

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

As verbs, gravel is a hyponym of bedevil; that is, gravel is a word with a more specific, narrower meaning than bedevil:

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

bedevil (verb)	gravel (verb)
be confusing or perplexing to; cause to be unable to think clearly	be a mystery or bewildering to
treat cruelly	cover with gravel
	cause annoyance in; disturb, especially by minor irritations