ANT - Any of various insects in the family Formicidae in the order Hymenoptera, typically living in large colonies composed almost entirely of flightless females.
BAN - To summon; call out.
BAT - Any of the small, nocturnal, flying mammals of the order Chiroptera, which navigate by means of echolocation. They look like a mouse with membranous wings extending from the forelimbs to the hind limbs or tail. Altogether, there are about 1,000 bat species in the world.
BAY - A berry.
BOY - Male servant.
NAB - To seize, arrest or take into custody a criminal or fugitive.
NOT - Negates the meaning of the modified verb.
TAB - A small flap or strip of material attached to something, for holding, manipulation, identification, etc.
TAN - A symbol of the trigonometric function tangent.
TON - A unit of weight (mass) equal to 2240 pounds (a long ton) or 2000 pounds (a short ton) or 1000 kilograms (a metric ton).
TOY - An inferior graffiti artist.
BOA - Any of a group of large American snakes, of the genus Boa, including the boa constrictor, the emperor boa of Mexico, and the chevalier boa of Peru.
BOT - The larva of a bot fly, which infests the skin of various mammals, producing warbles, or the nasal passage of sheep, or the stomach of horses.
OAT - Widely cultivated cereal grass, typically Avena sativa.
YON - Distant, but within sight.
BOAT - A craft used for transportation of goods, fishing, racing, recreational cruising, or military use on or in the water, propelled by oars or outboard motor or inboard motor or by wind.
BONY - Resembling, having the appearance or consistence of, or relating to bone; osseous.
BATON - A staff or truncheon, used for various purposes; as, the baton of a field marshal.
BOTANY - The scientific study of plants, a branch of biology. Typically those disciplines that involve the whole plant.