• hanle,
• hawii,
• harnor,
• hannh,
• hadno,
• thano,
• hawai,
• hanah,
• haroin,
• haior,
• handi,
• hunni,
• hunor,
• hanan,
• heanor,
• havi,
• hasno,
• haron,
• hanny,
• haooy

• Hanna,
• hand,
• hayne,
• hani,
• haun,
• Haehn,
• Hannah,
• haan,
• HAIN,
• haynie,
• hawn,
• hen,
• haoma,
• hand-,
• hahn,
• hann,
• honor,
• hang,
• hahne,
• Hanney,
• han,
• ham.

The adjective form of the word "Hanoi" is "Hanoian".

The plural form of the word "Hanoi" is still "Hanoi" as it is a proper noun that refers to a specific city in Vietnam. Proper nouns do not typically change when pluralized.

The singular form of the word "Hanoi" is "Hanoi". It is a proper noun that refers to the capital city of Vietnam and does not have a distinct singular form.