Denizens rhymes with:
artisans, citizen's, citizens, partisans, arkansans, artisans, citizen's, citizens, citizens', cousin's, cousins, couzens, cozzens, dozens, fisons, gazans, horizon's, horizons, imprisons, kansan's, kansans, kansans', partisans, poisons, prison's, prisons, raisins, reasons, resins, rosen's, season's, seasons, susan's, telxon's
Denizens sounds like:
damaging, dancing, dehumanizing, demagoguing, demjanjuk, demjanjuk's, demonizing, denison's, denkins, denouncing, dimensions, diminishing, dinkins, dinkins', dominicans, doomsaying, downsizing, downsizings, downswing, duensing, dungeons