donut machine vs donut fryer

donut machine and donut fryer both are nouns.

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

As nouns, donut machine and donut fryer are synonyms defined as:

donut machine and donut fryer: a machine used to fry large quantities of doughnuts at once.

Other synonyms of donut machine include doughnut fryer, doughnut machine.

donut machine (noun)	donut fryer (noun)
a machine used to fry large quantities of doughnuts at once.	a machine used to fry large quantities of doughnuts at once.