blockade vs obstruction

blockade and obstruction both are nouns.

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

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

Other hypernyms of blockade include impediment, impedimenta, obstructer, obstructor.

blockade (noun)	obstruction (noun)
a war measure that isolates some area of importance to the enemy	getting in someone's way
prevents access or progress	the act of obstructing
	any structure that makes progress difficult
	something immaterial that stands in the way and must be circumvented or surmounted
	the physical condition of blocking or filling a passage with an obstruction

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