sex activity vs chest

sex activity and chest both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex activity	Yes	No	No	No
chest	Yes	No	No	No

sex activity (noun)	chest (noun)
activities associated with sexual intercourse	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