R
- Rab - gravel
- Red - (a place-name element) ford
- Redders - (adjective) feeling physically hot, either from the weather or from exertion
- Right on - an informal way of saying goodbye
- Roar - weep loudly
- Ros - (a place-name element) moor or heath (or peninsula, "Roseland")
- Ruan - (a place-name element) river
- Rumped (up) - huddled up, usually from the cold; phrase "rumped up like a winnard"
Read more about this topic: List Of Cornish Dialect Words