Subotnick rhymes with:
blotnick, plotnick, slotnick, zlotnick, bartnick, bartnik, beatnik, blatnik, blotnick, bortnick, hutnick, mitnick, plotnick, slotnick, sputnik, sutnick, zlotnick
Subotnick sounds like:
septimus, shafting, shifting, sifting, softening, softens, softimage, softness, speeding, spitting, spotting, spouting, sputnik, sputniks, subatomic, subduing, swiftness