monos

mono (one) logos (speech/word)

A long speech made by one person

mono (one) arkos (ruler)

A person who rules a kingdom singly, like a king queen or empress

mono (one) gramma (letter)

A design composed of letter, usually the first letter of a name

mono (one) polien (to sell)

Sole ownership or control of anything (monopolize)

mono (one) lithos (stone)

A large block of stone

An organization that acts as a single unit, or a large business