13-letter words starting with ro
- roxas y acuña — Manuel (maˈnwel). 1892–1948, Philippine statesman; first president of the Republic of the Philippines (1946–48)
- roxburghshire — a historic county in SE Scotland.
- royal academy — a society founded in 1768 by George III of England for the establishment of a school of design and the holding of an annual exhibition of the works of living artists.
- royal charter — authorization by the monarchy
- royal marines — a corps of soldiers specially trained in amphibious warfare
- royal society — The Royal Society of London for the Advancement of Science, a society through which the British government has supported scientific investigation since 1662: awards four annual medals.
- royal warrant — an authorization to a tradesman to supply goods to a royal household