Y'all rhymes with:
alberthal, arenaball, basketball, birdsall, blackball, blumenthal, brimhall, butterball, cannonball, catcall, catchall, catterall, chatwal, cholesterol, cortisol, coverall, downfall, duckwall, ethanol, eyeball, fastball, fireball, football, footfall, footwall, freefall, gasohol, glycol, goodall, guildhall, handball, hardball, intellicall, josephthal, landfall, lebenthal, leventhal, lieberthal, lighthall, loveall, lysol, mayall, mayhall, meatball, mendenhall, metrocall, mothball, neanderthal, newall, newhall, nightfall, oddball, overall, overhaul, pinball, pitfall, powerball, pratfall, racquetball, rainfall, recall, rexall, richenthal, rohypnol, rosenthal, sadeh-koniecpol, samerol, schoenthal, screwball, shortfall, snowball, softball, southwall, spaceball, spitball, stickball, stonewall, summerall, thiokol, tidball, trackball, vanderpol, vauxhall, volleyball, waterfall, weatherall, westfall, wherewithal, whitehall, wigfall, windfall, woodall, woodhall, woodsmall
Y'all sounds like:
ya'll, yale, yehle, yell, yelle, yellow, yola, you'll, youell, yowell, yuill, yuille, yul, yule, yuli