blockade vs siege

blockade and siege both are nouns.

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

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

blockade: a war measure that isolates some area of importance to the enemy
siege: the action of an armed force that surrounds a fortified place and isolates it while continuing to attack

Other hyponyms of blockade include naval blockade, beleaguering, besieging, military blockade.

blockade (noun)	siege (noun)
a war measure that isolates some area of importance to the enemy	the action of an armed force that surrounds a fortified place and isolates it while continuing to attack
prevents access or progress

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