Herschel's rhymes with:
commercial's, commercials, beneficial's, bushels, commercial's, commercials, credentials, differentials, facials, ficials, financial's, financials, infomercial's, infomercials, initials, marshal's, marshall's, marshals, martials, official's, officials, officials', special's, specials
Herschel's sounds like:
harkless, hercules, hourglass, hourglasses