thoracic vs chest

thoracic is not a noun while chest is a noun.

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

thoracic (noun)	chest (noun)
	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

thoracic (adjective)	chest (adjective)
of or relating to the chest or thorax