Scrabble?! COG

Definitions of COG in various dictionaries:

noun - a subordinate who performs an important but routine function

noun - tooth on the rim of gear wheel

verb - roll steel ingots

verb - join pieces of wood with cogs

One of a series of teeth, as on the rim of a wheel or gear, whose engagement transmits successive motive force to a corresponding wheel or gear.

A cogwheel.

A subordinate member of an organization who performs necessary but usually minor or routine functions.

To load or manipulate (dice) fraudulently.

A tenon projecting from a wooden beam designed to fit into an opening in another beam to form a joint.

verb - to cheat at dice