Leaders' rhymes with:
leader's, leaders, birdfeeder's, birdfeeders, breeders, breeders', cedars, feeders, leader's, leaders, meaders, meadors, reader's, readers, readers', reeders, reiders, reiders', rieders, rieders', speeders
Leaders' sounds like:
ladders, laterza, lathers, lathouris, latter's, leader's, leaders, leadwork, leathers, leatrice, lehder's, lethargic, lethargy, letters, literacy, liters, litters, liturgy, loaders, lodwrick, looters, lotteries, lueders