Mole

(noun) the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites. Synonyms: gram molecule, mole, mol.

(noun) a spy who works against enemy espionage. Synonyms: counterspy, mole.

(noun) spicy sauce often containing chocolate. Synonyms: mole.

(noun) a small congenital pigmented spot on the skin. Synonyms: mole.

(noun) a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away. Synonyms: breakwater, groin, groyne, mole, bulwark, seawall, jetty.

(noun) small velvety-furred burrowing mammal having small eyes and fossorial forefeet. Synonyms: mole.