impede vs barricade

impede is not a noun while barricade is a noun.

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

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

impede (noun)	barricade (noun)
	a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
	a barrier (usually thrown up hastily) to impede the advance of an enemy

impede (verb)	barricade (verb)
block passage through	block off with barricades
be a hindrance or obstacle to	prevent access to by barricading
	render unsuitable for passage