Benson's rhymes with:
swensen's, aaronson's, ahmanson's, ahmansons, atkinson's, goldenson's, hansen's, hanson's, janssens, johnsen's, johnson's, johnsons, levinson's, manson's, parkinson's, robinson's, robinsons, robinsons', swensen's, wilkinson's, wisconsin's
Benson's sounds like:
banging, banishing, banking, banking's, benjamin's, bennigan's, bensing, benzing, binging, bounciness, bouncing, bunching