nin·com·poop 
(nĭnkəm-pp′, nĭng-)
(nĭnkəm-pp′, nĭng-)n.
A silly, foolish, or stupid person.
[Origin unknown.]
nincom·poop′er·y n.
- extensometer
- extensor
- extent
- extenuate
- extenuation
- extenuative
- extenuator
- extenuatory
- exterior
- exterior angle
- exteriority
- exteriorize
- exteriorly
- exterminate
- extermination
- exterminative
- exterminator
- exterminatory
- extern
- external
- external auditory canal
- external capsule
- external-combustion engine
- external ear
- externalism