nickname vs dub

nickname and dub both are nouns.

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

As verbs, nickname and dub are synonyms defined as:

nickname (noun)	dub (noun)
a familiar name for a person (often a shortened version of a person's given name)	the new sounds added by dubbing
a descriptive name for a place or thing

nickname (verb)	dub (verb)
give a nickname to	give a nickname to
	provide (movies) with a soundtrack of a foreign language
	raise (someone) to knighthood