Statistics Netherlands uses three other definitions of Amsterdam: metropolitan agglomeration Amsterdam (''Grootstedelijke Agglomeratie Amsterdam'', not to be confused with ''Grootstedelijk Gebied Amsterdam'', a synonym of ''Groot Amsterdam''), Greater Amsterdam (''Groot Amsterdam'', a COROP region) and the urban region Amsterdam (''Stadsgewest Amsterdam''). The Amsterdam Department for Research and Statistics uses a fourth conurbation, namely the ''Stadsregio Amsterdam'' ('City Region of Amsterdam'). The city region is similar to Greater Amsterdam but includes the municipalities of Zaanstad and Wormerland. It excludes Graft-De Rijp.