mill vs milling machinery

mill and milling machinery both are nouns.

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

As nouns, mill and milling machinery are synonyms defined as:

mill and milling machinery: machinery that processes materials by grinding or crushing

Other synonyms of mill include grinder.

mill (noun)	milling machinery (noun)
the act of grinding to a powder or dust	machinery that processes materials by grinding or crushing
machinery that processes materials by grinding or crushing
a plant consisting of one or more buildings with facilities for manufacturing

mill (verb)	milling machinery (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