Backflow and Low tide

Backflow noun - A flow that returns toward its source.

Low tide and backflow are semantically related. in regression topic. In some cases you can use "Low tide" instead a noun "Backflow".

Low tide noun - The lowest (farthest) ebb of the tide.

Backflow and low tide are semantically related. You can use "Backflow" instead a noun phrase "Low tide".