favor vs party favor

favor and party favor both are nouns.

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

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

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

Other synonyms of favor include favour, party favour.

favor (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