donut machine vs deep fryer

donut machine and deep fryer both are nouns.

Word	Noun	Adjective	Verb	Adverb
donut machine	Yes	No	No	No
deep fryer	Yes	No	No	No

As nouns, deep fryer is a hypernym of donut machine; that is, deep fryer is a word with a broader meaning than donut machine:

donut machine: a machine used to fry large quantities of doughnuts at once.
deep fryer: A kitchen appliance for deep frying; its size depends on intended use.

Other hypernyms of donut machine include machine, deep fat fryer, frier, fryer, fryolator.

donut machine (noun)	deep fryer (noun)
a machine used to fry large quantities of doughnuts at once.	A kitchen appliance for deep frying; its size depends on intended use.