• irinoco,
• krinoco,
• lrinoco,
• prinoco,
• 0rinoco,
• 9rinoco,
• oeinoco,
• odinoco,
• ofinoco,
• otinoco,
• orunoco,
• oronoco,
• orinico,
• oriinoco,
• orinocco,
• orincy,
• Prinecox,
• Doranock,
• Orzcoco,
• morinogo

• orang,
• ormiston.

The adjective form of the word "Orinoco" is "Orinocan".

The plural form of the word "orinoco" is "orinocos".

The singular form of the word "orinoco" is "orinoco". It is a proper noun referring to a specific geographical region, river, or type of dolphin and does not have a commonly used singular form.