clog vs impede

clog is a noun but impede is not a noun.

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

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

Other hypernyms of clog include block, close up, jam, obstruct, obturate, occlude.

clog (noun)	impede (noun)
a dance performed while wearing shoes with wooden soles; has heavy stamping steps
any object that acts as a hindrance or obstruction
footwear usually with wooden soles

clog (verb)	impede (verb)
impede with a clog or as if with a clog	block passage through
fill to excess so that function is impaired	be a hindrance or obstacle to
coalesce or unite in a mass
become or cause to become obstructed
impede the motion of, as with a chain or a burden
dance a clog dance