fridge vs deep freezer

fridge and deep freezer both are nouns.

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

As nouns, deep freezer is a hyponym of fridge; that is, deep freezer is a word with a more specific, narrower meaning than fridge:

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

Other hyponyms of fridge include deep-freeze, Deepfreeze, freezer, ice machine.

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