The best replacement for keepsake is memento.

The best alternatives to keepsake are rated as following:
★★★★★  memento
★★★  souvenir
★★★  memento:
★★★  keepsake
★★★  momento

Your alternative for keepsake is not listed? Suggest!
Speaking about keepsake, one probably shouldn't forget about funeral flowers.

Other search terms related to keepsake and their ratings are:
★★★★★ funeral flowers
You have in mind a companion for keepsake and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of keepsake in all years. Click on graph for more.
keepsake
memento
souvenir