athletics vs skin-dive

athletics and skin-dive both are nouns.

Word	Noun	Adjective	Verb	Adverb
athletics	Yes	No	No	No
skin-dive	Yes	No	Yes	No

athletics (noun)	skin-dive (noun)
an active diversion requiring physical exertion and competition	underwater swimming without any more breathing equipment than a snorkel
participation in sports events as an extracurricular activity
a contest between athletes

athletics (verb)	skin-dive (verb)
	swim underwater with no breathing apparatus other than a snorkel