hassle vs gravel

hassle and gravel both are nouns.

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

As verbs, gravel is a hypernym of hassle; that is, gravel is a word with a broader meaning than hassle:

Other hypernyms of hassle include annoy, bother, chafe, devil, get at, get to, irritate, nark, nettle, rag, rile, vex.

hassle (noun)	gravel (noun)
disorderly fighting	rock fragments and pebbles
an angry disturbance

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