confuse vs gravel

confuse is not a noun while gravel is a noun.

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

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

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

confuse (verb)	gravel (verb)
make unclear, indistinct, or blurred	be a mystery or bewildering to
mistake one thing for another	cover with gravel
be confusing or perplexing to; cause to be unable to think clearly	cause annoyance in; disturb, especially by minor irritations
assemble without order or sense
cause to feel embarrassment