fridge vs ice machine

fridge and ice machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
fridge	Yes	No	No	No
ice machine	Yes	No	No	No

As nouns, ice machine is a hyponym of fridge; that is, ice machine 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
ice machine: an electric refrigerator to supply ice cubes

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

fridge (noun)	ice machine (noun)
a refrigerator in which the coolant is pumped around by an electric motor	an electric refrigerator to supply ice cubes