Oviatt's rhymes with:
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, potshots, robot's, robots, slingshots, snapshots, sunspots
Oviatt's sounds like:
obits, obtuse, obviates, opdyke, opiates, opitz, optek, optic, optica, optics, opts, optus, ovett's, ovitt's, ovitz, ovitz's