bewilder vs stump

bewilder is not a noun while stump is a noun.

Word	Noun	Adjective	Verb	Adverb
bewilder	No	No	Yes	No
stump	Yes	No	Yes	No

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

Other hyponyms of bewilder include mix up, riddle, elude, escape.

bewilder (noun)	stump (noun)
	(cricket) any of three upright wooden posts that form the wicket
	a platform raised above the surrounding level to give prominence to the person on it
	the part of a limb or tooth that remains after the rest is removed
	the base part of a tree that remains standing after the tree has been felled

bewilder (verb)	stump (verb)
be a mystery or bewildering to	remove tree stumps from
cause to be confused emotionally	cause to be perplexed or confounded
	travel through a district and make political speeches
	walk heavily