“UNTACK” is a valid word. — 12 points Scrabble

auntthe sister of your father or mother; the wife of your uncle
tankan enclosed armored military vehicle; has a cannon and moves on caterpillar treads
cunta person (usually but not necessarily a woman) who is thoroughly disliked
tuckeatables (especially sweets)
tunatropical American prickly pear of Jamaica
cantstock phrases that have become nonsense through endless repetition
tackthe heading or position of a vessel relative to the trim of its sails

canairtight sealed metal container for food or drink or paint etc.
cuta share of the profits
acta legal document codifying the result of deliberations of a committee or society or legislative body
catfeline mammal usually having thick soft fur and no ability to roar: domestic cats; wildcats
nutusually large hard-shelled seed
tana browning of the skin resulting from exposure to the rays of the sun
katthe leaves of the shrub Catha edulis which are chewed like tobacco or used to make tea; has the effect of a euphoric stimulant
antsocial insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers
tauthe 19th letter of the Greek alphabet
utaa reptile genus of Iguanidae
tuna large cask especially one holding a volume equivalent to 2 butts or 252 gals
aukblack-and-white short-necked web-footed diving bird of northern seas

ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
anan associate degree in nursing
naa silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
unan organization of independent states formed in 1945 to promote international peace and security
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
kaunknown god; an epithet of Prajapati and Brahma
nuthe 13th letter of the Greek alphabet
utthe local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

UNTACK