Clocks and Tip-offs

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.

Tip-offs and clocks are semantically related. In some cases you can use "Tip-offs" instead a noun "Clocks".

Clocks and tip-offs are semantically related. You can use "Clocks" instead a noun phrase "Tip-offs".