“AGONIC” is a valid word. — 9 points Scrabble

congamusic composed for dancing the conga
acingsucceed at easily
coignexpandable metal or wooden wedge used by printers to lock up a form within a chase
incog
goniathe craniometric point on either side at the apex of the lower jaw

gaina quantity that is added
coina flat metal piece (usually a disc) used as money
ciaoan acknowledgment that can be used to say hello or goodbye (aloha is Hawaiian and ciao is Italian)
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
icon(computer science) a graphic symbol (usually a simple picture) that denotes a program or a command or a data file or a concept in a graphical user interface
agin
agona festivity in ancient Greece at which competitors contended for prizes
coni
naoi
agioa fee charged for exchanging currencies
cion

canairtight sealed metal container for food or drink or paint etc.
agogone by; or in the past
ainbelonging to or on behalf of a specified person (especially yourself); preceded by a possessive
conan argument opposed to a proposal
ginstrong liquor flavored with juniper berries
goaa state of southwestern India; a former Portuguese colony
nagsomeone (especially a woman) who annoys people by constantly finding fault
iona particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons
ganseparate the seeds from (cotton) with a cotton gin
noga wooden pin pushed or driven into a surface
coga subordinate who performs an important but routine function
aniblack tropical American cuckoo
ocaSouth American wood sorrel cultivated for its edible tubers

ina unit of length equal to one twelfth of a foot
onin operation or operational
noa negative
goa time for working (after which you will be relieved by someone else)
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)
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
aga soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography

AGONIC