cot·ter 
(kŏtər)
(kŏtər)n.
1. A bolt, wedge, key, or pin inserted through a slot in order to hold parts together.
2. A cotter pin.
[Origin unknown.]
- hydraulics
- hydrazide
- hydrazine
- hydria
- hydric
- hydride
- hydrilla
- hydriodic acid
- hydro
- hydro-
- hydrobiological
- hydrobiologist
- hydrobiology
- hydrobromic acid
- hydrobromide
- hydrocarbon
- hydrocarbonaceous
- hydrocarbonic
- hydrocarbonous
- hydrocast
- hydrocele
- hydrocephalic
- hydrocephaloid
- hydrocephalous
- hydrocephalus