blockage vs obstruction

blockage and obstruction both are nouns.

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

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

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

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

As nouns, blockage and obstruction are synonyms defined as:

blockage and obstruction: the physical condition of blocking or filling a passage with an obstruction

blockage (noun)	obstruction (noun)
the act of blocking	getting in someone's way
an obstruction in a pipe or tube	the act of obstructing
the physical condition of blocking or filling a passage with an obstruction	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