9-Letter Words Containing: O,P,E,N

• any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active

• a protein that combines with a coenzyme to form an active enzyme

• a percussion instrument with wooden bars tuned to produce a chromatic scale and with resonators; played with small mallets

• make into or use as a weapon or a potential weapon

• convert a cock into a capon