ridge-tile

n any of the tiles placed on the apex of the sloping roof of a building 脊瓦.

richly, richness, Richter scale, rick, rickets, rickety, rickshaw, ricochet, rid, riddance, ridden, riddle, ride, ride down, ride off, ride on, ride over, rider, ridge, ridge-pole, ridgeway, ridicule, ridiculous, ridiculously, ridiculousness, riding, riding-crop, riding-school, rife, riff, riff-raff, riffle, riffraff, rifle, rifle-range, rifleman, rifling, rift, rift valley, rig,