athletics vs overarm

athletics is a noun but overarm is not a noun.

Word	Noun	Adjective	Verb	Adverb
athletics	Yes	No	No	No
overarm	No	Yes	No	No

athletics (noun)	overarm (noun)
an active diversion requiring physical exertion and competition
participation in sports events as an extracurricular activity
a contest between athletes

athletics (adjective)	overarm (adjective)
	with hand brought forward and down from above shoulder level