deep freezer vs fridge

deep freezer and fridge both are nouns.

Word	Noun	Adjective	Verb	Adverb
deep freezer	Yes	No	No	No
fridge	Yes	No	No	No

As nouns, fridge is a hypernym of deep freezer; that is, fridge is a word with a broader meaning than deep freezer:

deep freezer: electric refrigerator (trade name Deepfreeze) in which food is frozen and stored for long periods of time
fridge: a refrigerator in which the coolant is pumped around by an electric motor

Other hypernyms of deep freezer include electric refrigerator.

deep freezer (noun)	fridge (noun)
electric refrigerator (trade name Deepfreeze) in which food is frozen and stored for long periods of time	a refrigerator in which the coolant is pumped around by an electric motor