icebox vs refrigerator

icebox and refrigerator both are nouns.

Word	Noun	Adjective	Verb	Adverb
icebox	Yes	No	No	No
refrigerator	Yes	No	No	No

As nouns, icebox and refrigerator are synonyms defined as:

icebox and refrigerator: white goods in which food can be stored at low temperatures

icebox (noun)	refrigerator (noun)
white goods in which food can be stored at low temperatures	white goods in which food can be stored at low temperatures