Swensen's rhymes with:
benson's, aaronson's, ahmanson's, ahmansons, atkinson's, benson's, goldenson's, hansen's, hanson's, janssens, johnsen's, johnson's, johnsons, levinson's, manson's, parkinson's, robinson's, robinsons, robinsons', wilkinson's, wisconsin's
Swensen's sounds like:
samsung, samsung's, sansing, schmiesing, schmoozing, senescence, sensenig, sensing, sequencing, shenanigans, simkins, singing, sinking, smacking, smashing, smoking, smoking's, smoshing, smugness, snacking, snagging, snaking, sneaking, sneezing, snoozing, snugging, squeamishness, ssangyong, sunshine's, swinging