esteem vs think of

esteem is a noun but think of is not a noun.

Word	Noun	Adjective	Verb	Adverb
esteem	Yes	No	Yes	No
think of	No	No	Yes	No

As verbs, esteem and think of are synonyms defined as:

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

esteem (noun)	think of (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)

esteem (verb)	think of (verb)
look on as or consider	keep in mind for attention or consideration
regard highly; think much of	look on as or consider
	intend to refer to
	take into consideration, have in view
	choose in one's mind
	devise or invent