blockade vs prevent

blockade is a noun but prevent is not a noun.

Word	Noun	Adjective	Verb	Adverb
blockade	Yes	No	Yes	No
prevent	No	No	Yes	No

As verbs, prevent is a hypernym of blockade; that is, prevent is a word with a broader meaning than blockade:

Other hypernyms of blockade include forbid, foreclose, forestall, preclude.

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

blockade (verb)	prevent (verb)
impose a blockade on	stop (someone or something) from doing something or being in a certain state
obstruct access to	keep from happening or arising; make impossible
render unsuitable for passage
hinder or prevent the progress or accomplishment of