fryer vs deep fryer

fryer and deep fryer both are nouns.

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

As nouns, fryer and deep fryer are synonyms defined as:

fryer and deep fryer: A kitchen appliance for deep frying; its size depends on intended use.

Other synonyms of fryer include deep fat fryer, frier, fryolator.

fryer (noun)	deep fryer (noun)
A kitchen appliance for deep frying; its size depends on intended use.	A kitchen appliance for deep frying; its size depends on intended use.
flesh of a medium-sized young chicken suitable for frying