milling machine vs shaper

milling machine and shaper both are nouns.

Word	Noun	Adjective	Verb	Adverb
milling machine	Yes	No	No	No
shaper	Yes	No	No	No

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

milling machine: 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 milling machine include shaping machine.

milling machine (noun)	shaper (noun)
machine tool in which metal that is secured to a carriage is fed against rotating cutters that shape it	a machine tool for shaping metal or wood
	a person who makes things