souvenir vs relic

souvenir and relic both are nouns.

Word	Noun	Adjective	Verb	Adverb
souvenir	Yes	No	No	No
relic	Yes	No	No	No

As nouns, souvenir and relic are synonyms defined as:

Other synonyms of souvenir include keepsake, token.

souvenir (noun)	relic (noun)
something of sentimental value	an antiquity that has survived from the distant past
a reminder of past events	something of sentimental value