What word starts with the letter V and pertains to water?

Rivers:

• Vaal (South Africa)
• Vardar (Macedonia, Greece)
• Victoria (Australia)
• Vilyuy (Russia)
• Vistula (Poland)
• Vitim (Russia)
• Vjosa (Greece)
• Volga (Russia)
• Volta (Africa)
• Vyatka (Russia)

Lakes:

• Varna Lake (Bulgaria)
• Volta Lake (Ghana)

Seas:

• Visayan Sea (Philippines)