Traders' rhymes with:
trader's, traders, graders, raider's, raiders, raiders', trader's, traders, blockaders, crusaders, evaders, graders, invaders, nader's, raider's, raiders, raiders', trader's, traders, waders
Traders' sounds like:
tartars, territories, territory's, tortorice, tortorici, torturers, tortures, torturous, trader's, traders, traitorous, traitors, treaters