ennoble vs dub

ennoble is not a noun while dub is a noun.

Word	Noun	Adjective	Verb	Adverb
ennoble	No	No	Yes	No
dub	Yes	No	Yes	No

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

Other hyponyms of ennoble include baronetise, baronetize, lord, knight.

ennoble (noun)	dub (noun)
	the new sounds added by dubbing

ennoble (verb)	dub (verb)
give a title to someone; make someone a member of the nobility	give a nickname to
confer dignity or honor upon	provide (movies) with a soundtrack of a foreign language
	raise (someone) to knighthood