grindstones
grind-stones
noun
Heavy rotating stone wheels used for sharpening tools or shaping materials.
"He sharpened the axe on the large grindstones."
Thesaurus
Synonyms: grindstone
grind-stones
Heavy rotating stone wheels used for sharpening tools or shaping materials.
"He sharpened the axe on the large grindstones."
Synonyms: grindstone