relic vs souvenir

relic and souvenir both are nouns.

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

As nouns, relic and souvenir are synonyms defined as:

Other synonyms of relic include keepsake, token.

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