Synonyms of 'souvenir'
A keepsake is a small present that someone gives you so that you will not forget them.
a keepsake of their brief encounter
A memento is an object which you keep because it reminds you of a person or a special occasion.
He took a camera to provide a memento of the day.
Thesaurus for souvenir from the Collins English Thesaurus
A souvenir is something which you buy or keep to remind you of a holiday , place, or event.