giz·mo also gis·mo 
(gĭzmō)
(gĭzmō)n. pl. giz·mos also gis·mos
A mechanical device or part whose name is forgotten or unknown; a gadget.
[Origin unknown.]
- predator
- predatorily
- predatoriness
- predatory
- predawn
- predecease
- predecessor
- predestinarian
- predestinarianism
- predestinate
- predestination
- predestine
- predeterminate
- predetermination
- predetermine
- predeterminer
- prediabetes
- prediabetic
- predial
- predial
- predicability
- predicable
- predicableness
- predicament
- predicamental