preferred vs favoured

preferred and favoured both are adjectives.

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

As adjectives, preferred and favoured are synonyms defined as:

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

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

preferred (adjective)	favoured (adjective)
more desirable than another	preferred above all others and treated with partiality
preferred above all others and treated with partiality