AIR - The atmospheric substance above the surface of the earth which animals breathe, formerly considered to be a single substance, one of the four basic elements of ancient philosophy and one of the five basic elements of Eastern traditions.
ART - Human effort to imitate, supplement, alter, or counteract the work of nature.
OAR - An implement used to propel a boat or a ship in the water, having a flat blade at one end, being rowed from the other end and being normally fastened to the vessel.
RAT - A medium-sized rodent belonging to the genus Rattus.
ROT - To suffer decomposition due to biological action, especially by fungi or bacteria.
TAR - A black, oily, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal.
OAT - Widely cultivated cereal grass, typically Avena sativa.
TOT - A small child.
ROAR - To make a loud, deep cry, especially from pain, anger, or other strong emotion.
TART - Sharp to the taste; acid; sour.
IOTA - The ninth, and smallest, letter of the Greek alphabet.
RATIO - A number representing a comparison between two things.
TRAIT - An identifying characteristic, habit or trend.
TAROT - A card game played in various different variations.
TRAITOR - One who violates his allegiance and betrays his/her country; one guilty of treason; one who, in breach of trust, delivers his country to an enemy, or yields up any fort or place intrusted to his defense, or surrenders an army or body of troops to the enemy, unless when vanquished; also, one who takes arms and levies war against his country; or one who aids an enemy in conquering his country.