blockage vs obstructor

blockage and obstructor both are nouns.

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

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

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

blockage (noun)	obstructor (noun)
the act of blocking	any structure that makes progress difficult
an obstruction in a pipe or tube	someone who systematically obstructs some action that others want to take
the physical condition of blocking or filling a passage with an obstruction