ARE - Second-person singular simple present tense of be.
ARK - A large box with a flat lid.
ART - Human effort to imitate, supplement, alter, or counteract the work of nature.
EAR - The organ of hearing, consisting of the pinna, auditory canal, eardrum, malleus, incus, stapes and cochlea.
ERA - A time period of indeterminate length, generally more than one year.
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.
AREA - A measure of the extent of a surface; it is measured in square units.
RATE - A wage calculated in relation to a unit of time.
TAKE - To grasp with the hands.
TEAR - To rend (a solid material) by holding or restraining in two places and pulling apart, whether intentionally or not; to destroy or separate.
TREK - A slow or difficult journey.
TEAK - An extremely durable timber highly valued for shipbuilding and other purposes, yielded by Tectona grandis (and Tectona spp.).
TAKER - One who takes something.
KARATE - An Okinawan martial art involving primarily punching and kicking, but additionally, advanced throws, arm bars, grappling and all means of fighting.