gravel vs puzzle

gravel and puzzle both are nouns.

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

As verbs, gravel and puzzle are synonyms defined as:

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

gravel (noun)	puzzle (noun)
rock fragments and pebbles	a game that tests your ingenuity
	a particularly baffling problem that is said to have a correct solution

gravel (verb)	puzzle (verb)
be a mystery or bewildering to	be a mystery or bewildering to
cover with gravel	be uncertain about; think about without fully understanding or being able to decide
cause annoyance in; disturb, especially by minor irritations