setback - difficulty, problem, delay, hitch⏎
revoke - cancel, not retain, end validity of⏎
zero hour - departure, beginning (of operation)⏎
training - learning, development, course, trainings, coaching, mentoring⏎
staple - basic, important (part)⏎
top flight - best, most successful, highest⏎
supply - provide (something) amount provided, make available for use⏎
voluntary - uncharged (fee), offered, done willingly⏎
segment - division, divide, part of something⏎
territory - area, zone, ground, pitch⏎