prefer vs favour

prefer is not a noun while favour is a noun.

Word	Noun	Adjective	Verb	Adverb
prefer	No	No	Yes	No
favour	Yes	No	Yes	No

As verbs, prefer and favour are synonyms defined as:

Other synonyms of prefer include favor.

prefer (noun)	favour (noun)
	an act of gracious kindness
	souvenir consisting of a small gift given to a guest at a party
	an advantage to the benefit of someone or something
	an inclination to approve
	a feeling of favorable regard

prefer (verb)	favour (verb)
select as an alternative over another	consider as the favorite
like better; value more highly	promote over another
promote over another	treat gently or carefully
give preference to one creditor over another	bestow a privilege upon