Stopwatch vs. Chronometer

Stopwatchnoun

A timepiece designed to measure the amount of time elapsed from a particular time when activated and when the piece is deactivated.

Chronometernoun

A device for measuring time, such as a watch or clock.

Stopwatchnoun

a timepiece that can be started or stopped for exact timing (as of a race)

Chronometernoun

An instrument for measuring time; a timekeeper.

Stopwatch

A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stop clock.

Chronometernoun

A portable timekeeper, with a heavy compensation balance, and usually beating half seconds; - intended to keep time with great accuracy for use an astronomical observations, in determining longitude, etc.

Chronometernoun

A metronome.

Chronometernoun

an accurate clock (especially used in navigation)