“Coward” and “cower” may seem logically connected. But “coward”—a noun used to scornfully label a fearful person—is derived from a French root, and “cower”—a verb meaning to crouch down, often fearfully—is derived from an entirely different Nordic one. “Cowered” is just the past tense of “cower” and should not be used as a spelling for the label given to a timid person. “It’s always “a coward” and “the coward.”

“Cowered” is also occasionally used improperly when “cowed”—meaning “intimidated”—is meant. It is not related etymologically to either “coward” or “cowered.”