stamp mill vs mill

stamp mill and mill both are nouns.

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

As nouns, mill is a hypernym of stamp mill; that is, mill is a word with a broader meaning than stamp mill:

stamp mill: a mill in which ore is crushed with stamps
mill: a plant consisting of one or more buildings with facilities for manufacturing

Other hypernyms of stamp mill include factory, manufactory, manufacturing plant.

stamp mill (noun)	mill (noun)
a mill in which ore is crushed with stamps	the act of grinding to a powder or dust
	machinery that processes materials by grinding or crushing
	a plant consisting of one or more buildings with facilities for manufacturing

stamp mill (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