stamp mill vs manufactory

stamp mill and manufactory both are nouns.

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

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

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

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

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