As nouns the difference between stopwatch and chronometer
is that stopwatch is a timepiece designed to measure the amount of time elapsed from a particular time when activated and when the piece is deactivated while chronometer is a device for measuring time, such as a watch or clock.
stopwatch
Noun
A timepiece designed to measure the amount of time elapsed from a particular time when activated and when the piece is deactivated.
chronometer
English
Alternative forms
* chronometre (nonstandard)
Noun
(
en noun)
A device for measuring time, such as a watch or clock.