stopwatchstopwatch /ˈstɑpwɑtʃ/ noun [countable] 
a watch used for measuring the exact time it takes to do something, especially to finish a race
a watch used for measuring the exact time it takes to do something, especially to finish a race- extractor
- extracurricular
- extraditable
- extradite
- extradition
- extrajudicial
- extramarital
- extramural
- extraneous
- extraneous solution
- extranet
- extraordinaire
- extraordinarily
- extraordinary
- extrapolate
- extrapolation
- extrasensory perception
- extraterrestrial
- extraterritorial
- extraterritoriality
- extravagance
- extravagant
- extravagantly
- extravaganza
- extravert