favoured vs pet

favoured is not a noun while pet is a noun.

Word	Noun	Adjective	Verb	Adverb
favoured	No	Yes	No	No
pet	Yes	Yes	Yes	No

As adjectives, favoured and pet are synonyms defined as:

favoured and pet: preferred above all others and treated with partiality

Other synonyms of favoured include best-loved, favored, favorite, favourite, preferent, preferred.

favoured (noun)	pet (noun)
	a domesticated animal kept for companionship or amusement
	a fit of petulance or sulkiness (especially at what is felt to be a slight)
	a special loved one

favoured (adjective)	pet (adjective)
preferred above all others and treated with partiality	preferred above all others and treated with partiality

favoured (verb)	pet (verb)
	stroke or caress gently
	stroke or caress in an erotic manner, as during lovemaking