ANT - Any of various insects in the family Formicidae in the order Hymenoptera, typically living in large colonies composed almost entirely of flightless females.
GUN - A very portable, short firearm, for hand use, which fires bullets or projectiles, such as a handgun, revolver, pistol, or Derringer.
HAT - A covering for the head, often in the approximate form of a cone or a cylinder closed at its top end, and sometimes having a brim and other decoration.
HUG - An affectionate close embrace.
HUT - A small wooden shed.
NUT - A hard-shelled seed.
TAG - A small label.
HAG - A witch, sorceress, or enchantress; also, a wizard.
AUNT - A sister or sister-in-law of someone's parent.
HANG - To be or remain suspended.
HUNG - Simple past tense and past participle of hang.
HUNT - To chase down prey and (usually) kill it.
TANG - Tongue.
THAN - (usually used with for) Because; for.
THUG - To commit acts of thuggery, to live the life of a thug, or to dress and act in a manner reminiscent of someone who does.
TUNA - Any of several species of fish, of the genus Thunnus, in the family Scombridae.
GNAT - Any small insect of the order Diptera, specifically within the suborder Nematocera.
HAUNT - To inhabit, or visit frequently (most often used in reference to ghosts).
GAUNT - Lean, angular, and bony.
NAUGHT - (now rare or archaic in US, Canada) Zero.