ACT - Something done, a deed.
ARC - A directed edge.
ART - Human effort to imitate, supplement, alter, or counteract the work of nature.
CAR - A wheeled vehicle, drawn by a horse or other animal.
CAT - Any similar animal of the family Felidae, which includes lions, tigers, bobcats, etc.
CRY - To shed tears; to weep.
CUT - Having been cut.
RAT - A medium-sized rodent belonging to the genus Rattus.
RAY - A beam of light or radiation.
RUT - Sexual desire or oestrus of cattle, and various other mammals.
TAR - A black, oily, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal.
TAU - The name of the letter T/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twentieth letter of Old and Ancient Greek.
CAY - A small, low island largely made of sand or coral.
CART - A small, open, wheeled vehicle, drawn or pushed by a person or animal, more often used for transporting goods than passengers.
TRAY - Trouble; annoyance; anger.
AURA - Distinctive atmosphere or quality associated with something.
CURT - Brief or terse, especially to the point of being rude.
RACY - Having a strong flavor indicating origin; of distinct characteristic taste; tasting of the soil; hence, fresh; rich.
CARAT - A unit of weight for precious stones and pearls, equivalent to 200 milligrams.
ACTUARY - Registrar, clerk.