miller vs shaper

miller and shaper both are nouns.

Word	Noun	Adjective	Verb	Adverb
miller	Yes	No	No	No
shaper	Yes	No	No	No

As nouns, shaper is a hypernym of miller; that is, shaper is a word with a broader meaning than miller:

miller: machine tool in which metal that is secured to a carriage is fed against rotating cutters that shape it
shaper: a machine tool for shaping metal or wood

Other hypernyms of miller include shaping machine.

miller (noun)	shaper (noun)
any of various moths that have powdery wings	a machine tool for shaping metal or wood
machine tool in which metal that is secured to a carriage is fed against rotating cutters that shape it	a person who makes things
someone who works in a mill (especially a grain mill)