impede vs obstruct

impede and obstruct both are verbs.

Word	Noun	Adjective	Verb	Adverb
impede	No	No	Yes	No
obstruct	No	No	Yes	No

As verbs, impede and obstruct are synonyms defined as:

Other synonyms of impede include block, close up, jam, obturate, occlude.

As verbs, obstruct is a hyponym of impede; that is, obstruct is a word with a more specific, narrower meaning than impede:

Other hyponyms of impede include block, close up, impede, jam, obturate, occlude, inhibit, repress, interfere, set back, hobble, stunt.

impede (verb)	obstruct (verb)
block passage through	block passage through
be a hindrance or obstacle to	shut out from view or get in the way so as to hide from sight
	hinder or prevent the progress or accomplishment of