blockade vs block up

blockade is a noun but block up is not a noun.

Word	Noun	Adjective	Verb	Adverb
blockade	Yes	No	Yes	No
block up	No	No	Yes	No

As verbs, blockade and block up are synonyms defined as:

Other synonyms of blockade include bar, barricade, block, block off, stop.

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

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