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

candidcharacterized by directness in manner or speech; without subtlety or evasion

undidcancel, annul, or reverse an action or its effect
canidany of various fissiped mammals with nonretractile claws and typically long muzzles
uncia
adunc
nicada rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low discharge rate when not in use

acidany of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
cain(Old Testament) Cain and Abel were the first children of Adam and Eve born after the Fall of Man; Cain killed Abel out of jealousy and was exiled by God
cadi
caid
duci
duadtwo items of the same kind
unaia sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot
unci(biology) any hook-shaped process or part

and
canairtight sealed metal container for food or drink or paint etc.
didengage in
dadan informal term for a father; probably derived from baby talk
ainbelonging to or on behalf of a specified person (especially yourself); preceded by a possessive
adda condition (mostly in boys) characterized by behavioral and learning disorders
aida resource
inna hotel providing overnight lodging for travelers
nuna woman religious
nanyour grandmother
dina loud harsh or strident noise
dudsomeone who is unsuccessful
duitwo items of the same kind
dunhorse of a dull brownish grey color
cadsomeone who is morally reprehensible
aniblack tropical American cuckoo
cudfood of a ruminant regurgitated to be chewed again

ina unit of length equal to one twelfth of a foot
anan associate degree in nursing
ida state in the Rocky Mountains
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)
ada public promotion of some product or service
unan organization of independent states formed in 1945 to promote international peace and security
aian agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders
nuthe 13th letter of the Greek alphabet

UNCANDID