1. Caput Octavum
Derivatives

2. Coloration: Coloring.
Colorful: having many colors; vivid.
Discolor: to change in color by streaking, staining, etc.
Colorless: without color.
Tricolor: three-colored.
Colorcast: color TV broadcast.
Colorblind: unable to distinguish colors.
Colorfast: with color not subject to running or staining.
Color: color
3. Forum: an assembly for discussion of public matters.
Forensic: suitable for public debate.
Forum: city center.
4. Assign
Design
Designate
Ensign
Insignificant
Signal
Signature
Signet
Signify
Significant
Signum: sign, seal, symbol
5. Albino: a person, animal, or plant lacking usual coloration.
Albumen: the white of an egg
Albus: white
6. Ornate: lavishly decorated.
Ornament: a decoration.
Adorn: to decorate or embellish.
Ornatus: decorated
7. Desolate: lonely, uninhabited.
Sole: without another, single.
Soliloquy: talking to oneself.
Solitaire: card game for one player.
Solitary: living or being alone.
Solitude: seclusion, being alone; a secluded place.
Solo: performance by one person.
Solus: only, alone.
8. Various: differing from one another.
Variable: apt to change.
Variance: degree of change.
Variation: change in form.
Variety: collection of different things.
Variegated: marked with different colors in spots, streaks, etc.
Vary: to change.
Varius: various.
9. Act
Action
Active
Actual
Agent
Agile
Agitate
Enact
React
Transaction
Ago: to drive, do, discuss, act.
10. Abuse: to mistreat
Misuse: to use incorrectly.
Peruse: to look through.
Unusual: uncommon.
Utensil: a tool for a specific use.
Utility: usefulness.
Utor: to wear regularly; to use.