Zollverein /tsolˈfər-īn/

1. A customs union
2. A union of the German states, under the leadership of Prussia, to enable them to act as one state in their commercial relations with other countries (historical)

• keened
• keener
• keeners
• keenest
• keening
• keenings
• keenly
• keenness
• keennesses
• keen on
• keens
• keep
• keepable
• keep a calm sough
• keep a good house
• keep an act
• keep a quarter
• keep a secret
• keep a stiff upper lip
• keep a straight bat
• keep a straight face
• keep at
• keep at bay
• keep a term
• keep a tight rein