Synonyms of unfasten

2 Syllables
unstop, gapped, untie, loosed, undid, open, unbound, detach, unfix, unpins, unbars, unsnaps, holing, gapping, uncork, unbar, unlash, unbind, undoes, loosen, unlock, loosing, untying, unscrew, unhitch, unclasp, unhook, unbolt, unpin, loosens, unlatch, unsnap, unstick, unstrap, holed, undo, unzip
3 Syllables
uncorked, releasing, uncorking, unlacing, unlashed, unsnapped, detaching, unlaced, unclasping, unloosed, unscrewing, unlace, uncoupled, fissured, loosening, unhinge, unfixing, unclasped, unstrapped, unsticking, unlocking, unbinding, unbuckle, detaches, unbutton, loosened, unzipped, uncouple, disenthrall, unsnapping, unhinging, fissuring, unloose, unloosen, unclose
4 Syllables
disengage, unloosening, disengaging