The folder structure should be like this.
 
The solution is created by using the ListTemplate. Following are the file required as shown above.
1) Feature.xml
<?xml version="1.0" encoding="utf-8" ?>
<Feature
Id="76927D6A-AC93-436b-9193-B65AC76D7088"
Title="Custom List Action Menu."
Description="Custom List Action Menu."
Scope="Site"
xmlns="http://schemas.microsoft.com/sharepoint/">
  <ElementManifests>
    <ElementManifest Location="Elements.xml" />
  </ElementManifests>
</Feature>
2)Elements.xml
<?xml version="1.0" encoding="utf-8" ?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
 <ListTemplate
  Name="Lists\CustomListAction"
  Type="1111"
  Category="Custom Lists"
  CacheSchema="TRUE"
  BaseType="0"
  OnQuickLaunch="TRUE"
  Hidden="FALSE"
  HiddenList="FALSE"
  Sequence="500"
  SecurityBits="11"
  DisplayName="CustomListAction."
  Image="/_layouts/images/word.jpg"/>
  <CustomAction
  Id="SY.Custom.Menu"
  Title="Export to word."
  Description="Click here to export list data to word document."
  RegistrationType="List"
  RegistrationId="1111"
  GroupId="ActionsMenu"
  Location="Microsoft.SharePoint.StandardMenu"
  ImageUrl="/_layouts/images/msword_export.jpg"
  Sequence="300">
    <UrlAction Url="/_layouts/ExportWord.aspx"/>
  </CustomAction>
</Elements>
Make sure that both Ids are the same because you are activating for a particular list.