Four letter latin words and the third is r?

Here are some four-letter Latin words with "r" as the third letter:

* "Urna" (urn)

* "Arra" (pledge, earnest money)

* "Aura" (air, breeze, atmosphere)

* "Frum" (from)

* "Murm" (murmur)

* "Dura" (hard)

* "Pura" (pure)

* "Turp" (shameful)

Let me know if you'd like to explore other word types or lengths!