15-Letter Words Containing: A,T,U,R,K

• a genetic disorder of metabolism; lack of the enzyme needed to turn phenylalanine into tyrosine results in an accumulation of phenylalanine in the body fluids which causes various degrees of mental deficiency

• an attack by a defending force against an attacking enemy force in order to regain lost ground or cut off enemy advance units etc.

• (chess) an attack that is intended to counter the opponent's advantage in another part of the board

• make a counterattack

• violating accepted standards or rules