dumbfound vs gravel

dumbfound is not a noun while gravel is a noun.

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

As verbs, dumbfound and gravel are synonyms defined as:

Other synonyms of dumbfound include amaze, baffle, beat, bewilder, flummox, get, mystify, nonplus, perplex, pose, puzzle, stick, stupefy, vex.

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

dumbfound (verb)	gravel (verb)
be a mystery or bewildering to	be a mystery or bewildering to
	cover with gravel
	cause annoyance in; disturb, especially by minor irritations