Clocks and Sundial

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.

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

Sundial noun - Timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial.

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