*roue*, m., wheel.
*rouge*, red.
*rouille*, f., rust.
*se rouiller*, to grow rusty.
*roulement*, m., rolling, roll.
*rouler*, to revolve, turn.
se ——, to roll about.
*route*, f., road.
en ——, on the way.
*rue*, f., street, passage.
*russe*, Russian.
*sain*, sound.