keepsake vs favor

keepsake and favor both are nouns.

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

As nouns, favor is a hyponym of keepsake; that is, favor is a word with a more specific, narrower meaning than keepsake:

Other hyponyms of keepsake include love-token, favour, party favor, party favour.

keepsake (noun)	favor (noun)
something of sentimental value	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