rac·er 
(rāsər)
(rāsər)n.
1. One that takes part in a race.
2. A vehicle used in racing.
3. Any of various fast-moving colubrid snakes of several genera, especially Coluber.
- solid propellant
- solid solution
- solid-state
- solid-state drive
- solid-state physics
- solidus
- solifluction
- Solihull
- soliloquist
- soliloquize
- soliloquizer
- soliloquy
- Solingen
- solipsism
- solipsist
- solipsistic
- solitaire
- solitarily
- solitariness
- solitary
- solitary confinement
- soliton
- solitude
- solitudinarian
- solleret