blockade vs besiege

blockade is a noun but besiege is not a noun.

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

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

Other hypernyms of blockade include beleaguer, circumvent, hem in, surround.

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

blockade (verb)	besiege (verb)
impose a blockade on	harass, as with questions or requests
obstruct access to	surround so as to force to give up
render unsuitable for passage	cause to feel distressed or worried
hinder or prevent the progress or accomplishment of