favour vs party favor

favour and party favor both are nouns.

Word	Noun	Adjective	Verb	Adverb
favour	Yes	No	Yes	No
party favor	Yes	No	No	No

As nouns, favour and party favor are synonyms defined as:

favour and party favor: souvenir consisting of a small gift given to a guest at a party

Other synonyms of favour include favor, party favour.

favour (noun)	party favor (noun)
an act of gracious kindness	souvenir consisting of a small gift given to a guest at a party
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