machinery vs mill

machinery and mill both are nouns.

Word	Noun	Adjective	Verb	Adverb
machinery	Yes	No	No	No
mill	Yes	No	Yes	No

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

Other hyponyms of machinery include enginery, technology, grinder, milling machinery.

machinery (noun)	mill (noun)
machines or machine systems collectively	the act of grinding to a powder or dust
a system of means and activities whereby a social institution functions	machinery that processes materials by grinding or crushing
	a plant consisting of one or more buildings with facilities for manufacturing

machinery (verb)	mill (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