pectus vs chest

pectus and chest both are nouns.

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

As nouns, pectus and chest are synonyms defined as:

pectus and chest: the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates

Other synonyms of pectus include thorax.

pectus (noun)	chest (noun)
the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates	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