toy box vs chest

toy box and chest both are nouns.

Word	Noun	Adjective	Verb	Adverb
toy box	Yes	No	No	No
chest	Yes	No	No	No

As nouns, chest is a hypernym of toy box; that is, chest is a word with a broader meaning than toy box:

toy box (noun)	chest (noun)
chest for storage of toys	box with a lid; used for storage; usually large and sturdy
	furniture with drawers for keeping clothes
	the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates
	the front of the trunk from the neck to the abdomen