down·spin 
(dounspĭn′)
(dounspĭn′)n.
An extremely swift, acute downturn, as in market activity.
- prednisone
- predoctoral
- predominance
- predominancy
- predominant
- predominantly
- predominate
- predominately
- predomination
- predominator
- preeclampsia
- preeclamptic
- pre-embryo
- pre-embryonic
- preemie
- preeminence
- preeminent
- preeminently
- preempt
- preemption
- preemptive
- preemptively
- preemptive right
- preemptor
- preemptory