incumbrance vs obstructor

incumbrance and obstructor both are nouns.

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

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

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

incumbrance (noun)	obstructor (noun)
any obstruction that impedes or is burdensome	any structure that makes progress difficult
an onerous or difficult concern	someone who systematically obstructs some action that others want to take
a charge against property (as a lien or mortgage)