biodefense vs defensive measure

biodefense and defensive measure both are nouns.

Word	Noun	Adjective	Verb	Adverb
biodefense	Yes	No	No	No
defensive measure	Yes	No	No	No

As nouns, defensive measure is a hypernym of biodefense; that is, defensive measure is a word with a broader meaning than biodefense:

biodefense: procedures involved in taking defensive measures against attacks using biological agents
defensive measure: (military) military action or resources protecting a country against potential enemies

Other hypernyms of biodefense include defence, defense.

biodefense (noun)	defensive measure (noun)
procedures involved in taking defensive measures against attacks using biological agents	(military) military action or resources protecting a country against potential enemies