ruinous - scapegrace
- Ruth
- Ruth
- ruth
- ruthenium
- ruthless
- Rutlandshire
- rutted
- rutty
- RW
- Rwanda
- Rwy railway
- Ry railway
- rye
- rye-bread
- ryot
- s snow
- s-o-b
- s.
- S.A.
- s.a.e.l. sine anno et loco
- S.Am. South America
- S.Aus. South Australia
- S.Austr. South Australia
- S.C.
- s.d.
- S.Dak. South Dakota
- S.E. Stock Exchange
- s.g. specific gravity
- S.M. Master of Science
- s.n. sine nomine
- S.P.C.A Society for the Prevention of Cruelty to Animals
- S.P.C.C. Society for the Prevention of Cruelty to Children
- S.P.R. Society for Psychical Research
- S.R.O. standing room only
- S.W. South Wales
- S.Yd. Scotland Yard
- s/c self-contained
- S/D sight draft
- S/S steamship
- SA subject to approval