Robot's rhymes with:
robots, robots, robots, aeroflot's, afterthoughts, apricots, aquanauts, astronaut's, boycotts, crackpots, croat's, croats, ersatz, feedlots, gunshots, hot-shots, hotshots, huguenots, jackpots, kilowatts, mascots, megawatts, ocelot's, oviatt's, potshots, robots, slingshots, snapshots, sunspots
Robot's sounds like:
rabbits, rafts, rapids, raptis, ravitch, ravitz, rebates, refutes, repeats, repetitious, repudiates, rifts, rivets, robidoux, robotic, robotics, robots