The term "harsh stone" can bring to mind a number of different associations. Stones that are harsh in texture might be smooth to the touch, but have sharp or jagged edges. Alternatively, harsh stones might be abrasive or rough, used for sharpening knives or tools. Synonyms for the term "harsh stone" could include words like abrasive, coarse, jagged, rough, sharp, textured or uneven. Additionally, one might use words like gravel, pebble, rock or stone to specify a particular type of harsh stone. These words can all help create a clearer picture of the type of stone being described.