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.
FUN - Enjoyable, amusing.
NUT - A hard-shelled seed.
TAN - A symbol of the trigonometric function tangent.
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.
AUNT - A sister or sister-in-law of someone's parent.
FLAT - Having no variations in altitude.
TUNA - Any of several species of fish, of the genus Thunnus, in the family Scombridae.
FLAN - Baked tart with sweet or savoury filling in an open-topped pastry case (the only meaning in UK).
FAULT - A defect; something that detracts from perfection.
FLAUNT - To wave or flutter smartly in the wind.