Biff and Blindside

Biff noun - A hard strike with a part of the body or an instrument.

Blindside and biff are semantically related In some cases you can use "Blindside" instead a noun "Biff".

Blindside verb - Attack or hit on or from the side where the attacked person's view is obstructed.

Biff and blindside are semantically related in hard hit topic. Sometimes you can use "Biff" instead a noun "Blindside".