comminute vs pestle

comminute is not a noun while pestle is a noun.

Word	Noun	Adjective	Verb	Adverb
comminute	No	No	Yes	No
pestle	Yes	No	Yes	No

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

Other hyponyms of comminute include pulp, mill.

comminute (noun)	pestle (noun)
	a club-shaped hand tool for grinding and mixing substances in a mortar
	a heavy tool of stone or iron (usually with a flat base and a handle) that is used to grind and mix material (as grain or drugs or pigments) against a slab of stone
	machine consisting of a heavy bar that moves vertically for pounding or crushing ores

comminute (verb)	pestle (verb)
reduce to small pieces or particles by pounding or abrading	grind, mash or pulverize in a mortar