The protesters rioteth in the streets.

The protesters riotest against the government's decision.

The riotousnesses of the crowd were evident during the protest.

Riometers are used to measure cosmic noise absorption in the ionosphere.

The riometer measures the absorption of radio waves in the ionosphere.

The riot girls took to the streets to protest against inequality.

The Swing riots were a series of protests and acts of violence by agricultural workers in the early 19th century.

My friend's name is Rion.

My friend's last name is Riopelle.

Riordan is a common surname in Ireland.