know as vs look on

know as and look on both are verbs.

Word	Noun	Adjective	Verb	Adverb
know as	No	No	Yes	No
look on	No	No	Yes	No

As verbs, know as and look on are synonyms defined as:

Other synonyms of know as include be known as, esteem, look upon, regard as, repute, take to be, think of.

know as (verb)	look on (verb)
look on as or consider	look on as or consider
assign a specified (usually proper) name to	observe without intervening