Difference between Cog and Sprocket

Cog

Part of speech: noun

Definition: A ship of burden, or war with a round, bulky hull. A tooth on a gear A gear; a cogwheel A unimportant individual in a greater system. a projection or tenon at the end of a beam designed to fit into a matching opening of another piece of wood to form a joint an act of cogging A spelling variant of the noun cogue.

Part of speech: verb

Definition: to cheat at dice to cheat; to play or gamble fraudulently

Example sentence: But the fact is, Mr. Chairman, for all the challenges the Postal Service of the 21st century faces, it still retains its traditional place as a key cog in how American businesses conduct their affairs and how Americans all across this land communicate.

Sprocket

Part of speech: noun

Definition: A toothed wheel that enmeshes with a chain or other perforated band.The tooth of such a wheel.A flared extension at the base of a sloped roof.