Dam and Forfend

Dam verb - To prevent passage through by filling with something.

Forfend and dam are semantically related In some cases you can use "Forfend" instead a verb "Dam".

Forfend verb - To drive danger or attack away from.

Dam and forfend are semantically related in prevent topic. Sometimes you can use "Dam" instead a verb "Forfend", if it concerns topics such as keep from happening or continuing.