protection vs defense

protection and defense both are nouns.

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

As nouns, defense is a hyponym of protection; that is, defense is a word with a more specific, narrower meaning than protection:

protection (noun)	defense (noun)
the activity of protecting someone or something	(military) military action or resources protecting a country against potential enemies
payment extorted by gangsters on threat of violence	the act of defending someone or something against attack or injury
kindly endorsement and guidance	a defendant's answer or plea denying the truth of the charges against him
the imposition of duties or quotas on imports in order to protect domestic industry against foreign competition	protection from harm
a covering that is intend to protect from damage or injury	a structure used to defend against attack
defense against financial failure; financial independence	the justification for some act or belief
the condition of being protected	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