white goods vs icebox

white goods and icebox both are nouns.

Word	Noun	Adjective	Verb	Adverb
white goods	Yes	No	No	No
icebox	Yes	No	No	No

As nouns, icebox is a hyponym of white goods; that is, icebox is a word with a more specific, narrower meaning than white goods:

white goods: large electrical home appliances (refrigerators or washing machines etc.) that are typically finished in white enamel
icebox: white goods in which food can be stored at low temperatures

white goods (noun)	icebox (noun)
drygoods for household use that are typically made of white cloth	white goods in which food can be stored at low temperatures
large electrical home appliances (refrigerators or washing machines etc.) that are typically finished in white enamel