mill vs meat grinder

mill and meat grinder both are nouns.

Word	Noun	Adjective	Verb	Adverb
mill	Yes	No	Yes	No
meat grinder	Yes	No	No	No

As nouns, meat grinder is a hyponym of mill; that is, meat grinder is a word with a more specific, narrower meaning than mill:

mill (noun)	meat grinder (noun)
the act of grinding to a powder or dust	any action resulting in injury or destruction
machinery that processes materials by grinding or crushing	a mill for grinding meat
a plant consisting of one or more buildings with facilities for manufacturing

mill (verb)	meat grinder (verb)
grind with a mill
produce a ridge around the edge of
roll out (metal) with a rolling machine
move about in a confused manner