set back vs impede

set back and impede both are verbs.

Word	Noun	Adjective	Verb	Adverb
set back	No	No	Yes	No
impede	No	No	Yes	No

As verbs, impede is a hypernym of set back; that is, impede is a word with a broader meaning than set back:

Other hypernyms of set back include hinder.

set back (verb)	impede (verb)
slow down the progress of; hinder	block passage through
cost a certain amount	be a hindrance or obstacle to
hold back to a later time