know as vs esteem

know as is not a noun while esteem is a noun.

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

As verbs, know as and esteem are synonyms defined as:

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

know as (noun)	esteem (noun)
	an attitude of admiration or esteem
	a feeling of delighted approval and liking
	the condition of being honored (esteemed or respected or well regarded)

know as (verb)	esteem (verb)
look on as or consider	look on as or consider
assign a specified (usually proper) name to	regard highly; think much of