UNIQUE WORDS game to increase our vocabulary - alphabetical order

Pathbreaking: characterized by originality and innovation; pioneering

Rotable - a Qualified Spare Part that wears over time and can be repeatedly restored to a serviceable condition over a period approximating the life of the flight equipment to which it relates.   

Trifecta - a bet in which the person betting forecasts the first three finishers in a race in the correct order.

Vamoose - depart hurriedly.

"we'd better vamoose before we're caught

Xerothermic:  both dry and hot;

adapted to or flourishing in an environment that is both dry and hot

Apostrophising: to address by or speak or write in apostrophe.

Directorate:  the office or position of a director;

a board of directors, as of a corporation;

 The entire staff of a bureau or department.