Eating away and Gnawing away

Eating away noun - Geology) the mechanical process of wearing or grinding something down (as by particles washing over it.

Gnawing away and eating away are semantically related. In some cases you can use "Gnawing away" instead a noun phrase "Eating away".

Eating away and gnawing away are semantically related. You can use "Eating away" instead a noun phrase "Gnawing away".