* Urn (a vase, especially one used to hold ashes)
* Burn (to set something on fire)
* Turn (to change direction or position)
* Spurn (to reject or refuse)
* Mourn (to feel or express sorrow)
* Churn (to stir or shake vigorously)
* Stern (serious, strict, or severe)
* Sern (a type of small, hand-held fan) - This word is relatively uncommon and may not be in most dictionaries.
Let me know if you'd like to explore other words starting with "ur" or "urn"!