chennai

As a verb kolkata

is to knock out (to render someone unconscious).

As a proper noun chennai is

state capital of tamil nadu (india), formerly known as madras.

As proper nouns the difference between chennai and karnataka

is that chennai is state capital of Tamil Nadu (India), formerly known as Madras while Karnataka is a state in southern India which has Bangalore as its capital.

As proper nouns the difference between chennai and thiruvananthapuram

is that chennai is state capital of Tamil Nadu (India), formerly known as Madras while Thiruvananthapuram is state capital of Kerala (India), formerly known as Trivandrum.

As proper nouns the difference between mumbai and chennai

is that mumbai is state capital of Maharashtra, India, formerly known as Bombay while Chennai is state capital of Tamil Nadu (India), formerly known as Madras.

As proper nouns the difference between chennai and hyderabad

is that chennai is state capital of Tamil Nadu (India), formerly known as Madras while Hyderabad is the state capital of Telangana state and Andhra Pradesh state in India.