know as vs rename

know as and rename both are verbs.

Word	Noun	Adjective	Verb	Adverb
know as	No	No	Yes	No
rename	No	No	Yes	No

As verbs, rename is a hyponym of know as; that is, rename is a word with a more specific, narrower meaning than know as:

Other hyponyms of know as include baptise, baptize, christen, refer, style, title, dub, nickname, entitle, title, term, tag.

know as (verb)	rename (verb)
look on as or consider	assign a new name to
assign a specified (usually proper) name to	name again or anew