chest vs sternum

chest and sternum both are nouns.

Word	Noun	Adjective	Verb	Adverb
chest	Yes	No	No	No
sternum	Yes	No	No	No

chest (noun)	sternum (noun)
box with a lid; used for storage; usually large and sturdy	the flat bone that articulates with the clavicles and the first seven pairs of ribs
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