shoetree shoetree /ˈʃuːˌtriː/

noun

1. A wooden or metal device that is inserted into a shoe to preserve its shape when it is not being worn  ( shoetree )
   a wooden or metal device that is inserted into a shoe to preserve its shape when it is not being worn
    Using a shoetree helps maintain the shape of leather shoes.
   Using a shoetree helps maintain the shape of leather shoes.
   
   

verb

1. Stretch (a shoe) on a shoetree  ( shoetree , tree )
   stretch (a shoe) on a shoetree
   

 water system water system /ˈwɔːtər ˈsɪstəm/

noun

1. A facility that provides a source of water  ( water supply , water system , water )
   a facility that provides a source of water
    The town debated the purification of the water supply
   the town debated the purification of the water supply
    First you have to cut off the water
   first you have to cut off the water
   
   
2. A river and all of its tributaries  ( water system )
   a river and all of its tributaries
   

 nitric bacteria nitric bacteria /ˈnaɪtrɪk bækˈtɪəriə/

noun

1. Soil bacteria that convert nitrites to nitrates  ( nitric bacteria , nitrobacteria )
   soil bacteria that convert nitrites to nitrates
   
   

 dispatch box dispatch box /dɪsˈpætʃ bɒks/

noun

1. Case consisting of an oblong container (usually having a lock) for carrying dispatches or other valuables  ( dispatch box , dispatch case )
   case consisting of an oblong container (usually having a lock) for carrying dispatches or other valuables