Concourses rhymes with:
counterforces, racehorses, workhorses, airforces, bourse's, bourses, counterforces, course's, discourses, divorces, endorses, enforces, force's, forces, forces', horses', outsources, pierce's, racehorses, reinforces, resources, resources', source's, workhorses
Concourses sounds like:
cancer's, cancerous, cancers, cankers, ceniceros, censors, changers, commissaries, commissars, conagra's, concierge, concourse, concurs, congress, congress', congress's, congresses, conjures, connoisseurs, conqueror's, conquerors, conquers