whip·lash 
(wĭplăsh′, hwĭp-)
(wĭplăsh′, hwĭp-)n.
1. The lash of a whip.
2. An injury to the cervical spine caused by an abrupt jerking motion of the head, either backward or forward.
- subsp.
- subspecialist
- subspecialization
- subspecialize
- subspecialty
- subspecies
- subspecific
- subst.
- substage
- substance
- substance abuse
- substance abuser
- substance P
- substance use disorder
- substandard
- substantia gelatinosa
- substantial
- substantiality
- substantially
- substantialness
- substantia nigra
- substantiate
- substantiation
- substantival
- substantivally