What rhymes with unfasten

1 Syllable
hasn't
2 Syllables
ashton, asir, caster, castor, maestro, master, pashto, pastor, plaster
3 Syllables
bandmaster, bathwater, broadcaster, canaster, cathepsin, choirmaster, disaster, fastener, gastrotrich, lankester, lodestar, masterful, pilaster, postmaster, quizmaster, ringmaster, scoutmaster, southwesterly, taskmaster, travesty, unfasten
4 Syllables
alabaster, burgomaster, housemaster, ironmaster, maharashtra, palestine, quartermaster, toastmaster