“KNACKING” is a valid word. — 19 points Scrabble

kinga male sovereign; ruler of a kingdom
nickan impression in a surface (as made by a blow)
kickthe act of delivering a blow with the foot
gaina quantity that is added
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
akinsimilar in quality or character
kinka painful muscle spasm especially in the neck or back (`rick' and `wrick' are British)
agin
kakismall deciduous Asiatic tree bearing large red or orange edible astringent fruit
kain
kinathe basic unit of money in Papua New Guinea
gink

canairtight sealed metal container for food or drink or paint etc.
ainbelonging to or on behalf of a specified person (especially yourself); preceded by a possessive
inna hotel providing overnight lodging for travelers
ginstrong liquor flavored with juniper berries
inka liquid used for printing or writing or drawing
kina person having kinship with another or others
nanyour grandmother
nagsomeone (especially a woman) who annoys people by constantly finding fault
ganseparate the seeds from (cotton) with a cotton gin
aniblack tropical American cuckoo
ick

ina unit of length equal to one twelfth of a foot
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
kaunknown god; an epithet of Prajapati and Brahma
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

KNACKING