ANT - Any of various insects in the family Formicidae in the order Hymenoptera, typically living in large colonies composed almost entirely of flightless females.
FAN - A hand-held device consisting of concertinaed material, or slats of material, gathered together at one end, that may be opened out into the shape of a sector of a circle and waved back and forth in order to move air towards oneself and cool oneself.
FAT - A large tub or vessel for water, wine, or other liquids; a cistern.
NOT - Negates the meaning of the modified verb.
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).
NAN - Affectionate name for a grandmother.
AFT - The stern portion of a vessel.
OAT - Widely cultivated cereal grass, typically Avena sativa.
OFT - Often; frequently; not rarely; many times.
FONT - A receptacle in a church for holy water - especially one used in baptism.
NONFAT - Containing no fat; fat free.