* Endorse
* Endow
* Endure
* Endanger
* Endear
* Endless
* Endgame
* Endocrine
* Endomorphic
* Endoskeleton
* Endoscopy
* Entice (Less common usage, but technically starts with the prefix "en" which is related to "end")
Let me know if you'd like to explore more words with this prefix!