Sinonim grindstone

English Thesaurus

1. a revolving stone shaped like a disk; used to grind or sharpen or polish edge tools (noun.artifact)

hypernym	:	sharpener,
definition	:	any implement that is used to make something (an edge or a point) sharper (noun.artifact)

hypernym	:	stone,
definition	:	building material consisting of a piece of rock hewn in a definite shape for a special purpose (noun.artifact)