athletics vs defense

athletics and defense both are nouns.

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

athletics (noun)	defense (noun)
an active diversion requiring physical exertion and competition	(military) military action or resources protecting a country against potential enemies
participation in sports events as an extracurricular activity	the act of defending someone or something against attack or injury
a contest between athletes	a defendant's answer or plea denying the truth of the charges against him
	protection from harm
	a structure used to defend against attack
	the justification for some act or belief
	the speech act of answering an attack on your assertions
	the defendant and his legal advisors collectively
	(sports) the team that is trying to prevent the other team from scoring
	an organization of defenders that provides resistance against attack
	(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires