adjective, pluck·i·er, pluck·i·est.
Examples from the Web for pluckiness
President Obama acknowledged the pluckiness of Bostonians when he spoke just hours after the attack.
They were decidedly in the wrong, but one cannot but admire their pluckiness.The Story of London|Henry B. Wheatley
It is no more than he ought to have done, for your pluckiness saved Flurry.Esther|Rosa Nouchette Carey
It was beautiful, the pluckiness of it, the impudence of it.Following the Equator, Complete|Mark Twain (Samuel Clemens)