Speeding rhymes with:
impeding, stampeding, acceding, bleeding, breeding, ceding, conceding, exceeding, feeding, heeding, impeding, inbreeding, interceding, kneading, leading, misleading, misreading, needing, pleading, preceding, preceeding, proceeding, receding, reding, rereading, seceding, seeding, stampeding, succeeding, superseding, weeding
Speeding sounds like:
septimus, shafting, shifting, sifting, softening, softens, softimage, softness, spitting, spotting, spouting, sputnik, sputniks, subatomic, subduing, subotnick, swiftness