sole - only, one⏎
zenith - summit, top, peak⏎
vendee - buyer, property purchaser⏎
stable - steady, unchanging, firmly fixed⏎
scheme - plan, system⏎
seller - vendor, trader⏎
upsurge - sudden large increase⏎
train - teach, instruct, tutor, coach, mentor, educate, edify, nurture, develop, school, explain, impart (facts/information), prepare, prime, demonstrate, illustrate⏎
vet - examine, check, screen (something or someone)⏎
walkout - strike (by workers), fail in duty⏎