Confessing rhymes with:
professing, acquiescing, addressing, assessing, blaesing, blessing, caressing, coalescing, compressing, depressing, digressing, distressing, dressing, expressing, guessing, hessing, impressing, lessing, messing, obsessing, oppressing, possessing, pressing, professing, progressing, reassessing, recessing, redressing, repressing, stressing, suppressing, transgressing
Confessing sounds like:
campaign's, campaigning, campaigns, campesinos, canvassing, champagnes, composing, confessions, confusing, confusions