MONO
UNUS
DUO
BI
100

A long speech made by one performer.

Monologue

100

A unit of measure for mass, weight or volume.

Ounce

100

Being twice as great or as many.

Double

100

Cut in two.

Bisect

200

Person who rules a kingdom or empire.

Monarch

200

Together, at the same time.

Unison

200

To make an identical copy.

Duplicate

200

Large muscle in upper arm.

Bicep

300

A single eyeglass.

Monocle

300

Being in complete agreement.

Unanimous

300

Dwelling with two units.

Duplex

300

Speak two languages.

Bilingual

400

Dull, tedious and repetitious; lacking in variety and interest.

Monotonous

400

Whole body of things that exist.

Universe

400

Rhythm based on two beat per measure.

Duple
400

Involving two political parties.

Bipartisan

500

A color scheme that uses one color or hue.

Monochromatic or Monochrome

500

Having a single legislative chamber.

Unicameral

500

Speaking or acting in two ways; double dealing.

Duplicity

500

Divide into two branches.

Bifurcate