Here's what rhymes with unclosable.
                        
                        
                    
                                disposable  Words that almost rhyme with unclosable
sociable  negotiable  unsociable  nonnegotiable  renegotiable  notable  knowable  potable  quotable  erodible  controllable  unknowable  approachable  unapproachable  inapproachable  revokable  uncontrollable  notional  reproachable  consolable  emotional  irreproachable  inconsolable  unemotional  devotional  promotional  overemotional