surround vs blockade

surround and blockade both are nouns.

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

As verbs, blockade is a hyponym of surround; that is, blockade is a word with a more specific, narrower meaning than surround:

Other hyponyms of surround include seal off, ebb.

surround (noun)	blockade (noun)
the area in which something exists or lives	a war measure that isolates some area of importance to the enemy
	prevents access or progress

surround (verb)	blockade (verb)
surround so as to force to give up	impose a blockade on
surround with a wall in order to fortify	obstruct access to
extend on all sides of simultaneously; encircle	render unsuitable for passage
envelop completely	hinder or prevent the progress or accomplishment of