grinder
grind-er
noun
A person whose occupation involves grinding or sharpening items professionally.
"The knife grinder sharpened the blades."
noun
A machine or tool used for crushing, pulverising, or sharpening materials.
"He bought a new coffee grinder."
Thesaurus
Synonyms: mill, milling machinery, molar, submarine, submarine sandwich, bomber, wedge, hoagie, hero sandwich, Italian sandwich, sub, Cuban sandwich