Clocks and Stopwatch

Clocks noun - European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage.

Stopwatch and clocks are semantically related. in timekeeping device topic. In some cases you can use "Stopwatch" instead a noun "Clocks".

Stopwatch noun - A timepiece that can be started or stopped for exact timing (as of a race).

Clocks and stopwatch are semantically related. Sometimes you can replace term "Clocks" with "Stopwatch", this nouns are similar.