chest vs area of cardiac dullness

chest and area of cardiac dullness both are nouns.

Word	Noun	Adjective	Verb	Adverb
chest	Yes	No	No	No
area of cardiac dullness	Yes	No	No	No

chest (noun)	area of cardiac dullness (noun)
box with a lid; used for storage; usually large and sturdy	a triangular area of the front of the chest (determined by percussion); corresponds to the part of the heart not covered by the lungs
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