• soei,
• xoei,
• coei,
• foei,
• roei,
• eoei,
• diei,
• dkei,
• dpei,
• d0ei,
• d9ei,
• dowi,
• dosi,
• do4i,
• do3i,
• doeu,
• doej,
• doe9,
• doe8,
• sdoei

• doh,
• doha,
• doe,
• DO,
• Dowe,
• Dow,
• DoI.

The adjective form of the word "DOEI" is "Dutch".

The plural form of the word "DOEI" is "DOEI".

The singular form of the word "DOEI" does not exist, as it is already a singular form in Dutch. "DOEI" is an informal way of saying goodbye in Dutch, and it is used for both singular and plural situations.