Sheet pile and Spile

Sheet pile noun - A pile in a row of piles driven side by side to retain earth or prevent seepage.

Spile and sheet pile are semantically related. In some cases you can use "Spile" instead a noun phrase "Sheet pile".

Spile noun - A column of wood or steel or concrete that is driven into the ground to provide support for a structure.

Sheet pile and spile are semantically related. Sometimes you can replace phrase "Sheet pile" with "Spile", this terms are similar.