• channal,
• thenna,
• cienna,
• chennle,
• chinna,
• chennei,
• ahtinai,
• channar,
• chelonnian,
• chenai,
• cheennai,
• chennaii,
• channai,
• chennay,
• chennaa,
• henwaare,
• channan,
• Chesnay,
• Chesnie,
• chesni

• chin,
• chian,
• chauna,
• Chunn,
• chon,
• Chun,
• Chan,
• chime,
• Chen,
• cheyenne,
• chino,
• china,
• chinn,
• chyme,
• chien,
• Chana,
• chine,
• chain.

The adjective form of the word "Chennai" is "Chennaiite" or "Chennaite".

The plural form of the word "Chennai" is "Chennais".

The singular form of the word "Chennai" is still "Chennai". It is both the singular and the plural form of the name for the capital city of the Indian state of Tamil Nadu.