be known as vs dub

be known as is not a noun while dub is a noun.

Word	Noun	Adjective	Verb	Adverb
be known as	No	No	Yes	No
dub	Yes	No	Yes	No

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

Other hyponyms of be known as include baptise, baptize, christen, refer, style, title, nickname, rename, entitle, title, term, tag.

be known as (noun)	dub (noun)
	the new sounds added by dubbing

be known as (verb)	dub (verb)
look on as or consider	give a nickname to
assign a specified (usually proper) name to	provide (movies) with a soundtrack of a foreign language
	raise (someone) to knighthood