rise up
     v 1: come to the surface [syn: {surface}, {come up}, {rise}]
     2: take part in a rebellion; renounce a former allegiance [syn:
         {rebel}, {arise}, {rise}]
     3: stand up on the hind legs, of quadrupeds; "The horse reared
        in terror" [syn: {rear}]
Source: WordNet® 2.0