Pentref, a village, a hamlet.

Pistyll, a spout, a cataract.

Plâs, a hall or palace.

Plwyf, a parish.

Pont, a bridge.

Porth, a ferry, a port, a gateway.

Pwll, a pit, a pool.

Rhaiadr, a cataract.

Rhiw, an ascent.

Rhôs, a moist plain or meadow.