The term 'tear into pieces' can be expressed in two words: 'REND' and 'ripup'. 'REND' is a verb meaning to tear or split something apart violently, while 'ripup' is a verb meaning to tear something apart quickly and forcefully. Both words are used to describe the action of tearing something into pieces. This action can be done with hands, claws, teeth, or any other tool that can be used to tear something apart.