Knock-down and Push down

Knock-down adjective - Strong enough to knock down or overwhelm.

Push down and knock-down are semantically related. In some cases you can use "Push down" instead a verb phrase "Knock-down".

Push down verb - Cause to come or go down.

Knock-down and push down are semantically related. Sometimes you can replace phrase "Knock-down" with "Push down", this terms are similar.