look upon vs know as

look upon and know as both are verbs.

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

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

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

look upon (verb)	know as (verb)
look on as or consider	look on as or consider
	assign a specified (usually proper) name to