travel on shoes with steel or rubber rollers attached to their soles
a grounder that rolls along the infield
a long heavy sea wave as it advances towards the shore
a small wheel without spokes (as on a roller skate)
a cylinder that revolves
pigeon that executes backward somersaults in flight or on the ground
sports equipment that is worn on the feet to enable the wearer to glide along and to be propelled by the alternate actions of the legs
move along on skates
large edible rays having a long snout and thick tail with pectoral fins continuous with the head; swim by undulating the edges of the pectoral fins
