Repressing rhymes with:
compressing, depressing, expressing, impressing, oppressing, pressing, suppressing, addressing, compressing, depressing, digressing, distressing, dressing, expressing, impressing, oppressing, pressing, progressing, redressing, stressing, suppressing, transgressing
Repressing sounds like:
refreshing, repercussions, repressions, repricing, reprocessing, repurchasing, reversing