Workhorses rhymes with:
racehorses, concourses, counterforces, racehorses, airforces, bourse's, bourses, concourses, counterforces, course's, discourses, divorces, endorses, enforces, force's, forces, forces', horses', outsources, pierce's, racehorses, reinforces, resources, resources', source's
Workhorses sounds like:
weyerhaeuser's, worker's, workers, workers', workhorse