blockade vs military action

blockade and military action both are nouns.

Word	Noun	Adjective	Verb	Adverb
blockade	Yes	No	Yes	No
military action	Yes	No	No	No

As nouns, military action is a hypernym of blockade; that is, military action is a word with a broader meaning than blockade:

Other hypernyms of blockade include action.

blockade (noun)	military action (noun)
a war measure that isolates some area of importance to the enemy	a military engagement
prevents access or progress

blockade (verb)	military action (verb)
impose a blockade on
obstruct access to
render unsuitable for passage
hinder or prevent the progress or accomplishment of