He has a vast amount of knowledge.

This train has unreserved seats.

In spring, the amount of water in the river increases due to the melting of snow.

He is known as a knowledgeable person.

He is known as one of the foremost scientists.

His company is one of the most prominent in this industry.

Safety always takes priority over everything else.

He is offering English lessons for a fee.

Yusuke is my best friend.

He is good at writing free verse.