ART - Human effort to imitate, supplement, alter, or counteract the work of nature.
FAR - Remote in space.
FAT - A large tub or vessel for water, wine, or other liquids; a cistern.
FLU - Influenza.
FUR - Hairy coat of various mammal species, especially: when fine, soft and thick.
RAT - A medium-sized rodent belonging to the genus Rattus.
TAR - A black, oily, sticky, viscous substance, consisting mainly of hydrocarbons derived from organic materials such as wood, peat, or coal.
AFT - The stern portion of a vessel.
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.
ALT - A state of excitement, conveyed by a high pitched voice.
LAT - A Latvian coin and national monetary unit.
FLAT - Having no variations in altitude.
RAFT - A flat structure made of planks, barrels etc., that floats on water, and is used for transport, emergencies or a platform for swimmers.
TURF - A layer of earth covered with grass; sod.
FRAT - Shortened form for fraternity, college organization. (Often used as a noun modifier.).
FAULT - A defect; something that detracts from perfection.
ULTRA - Extreme; far beyond the norm.
ARTFUL - Performed with, or characterized by, art or skill.