whetstone

English Thesaurus

1. a flat stone for sharpening edged tools or knives (noun.artifact)

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

hyponym	:	hone,
definition	:	a whetstone made of fine gritstone; used for sharpening razors (noun.artifact)

hyponym	:	oilstone,
definition	:	a whetstone for use with oil (noun.artifact)