Buddhists do not worship any gods or people, so there is no one who leads any worship service. A Buddhists master (who might have one of a long list of titles, like Geshe, Lama, Rinpoche, etc) will lead teaching or meditation sessions.
Monk
It is called a temple
its called a stupa
It's called a Pagoda.
The daily worship leader is called Imam.
You dont worship in Buddhism.
Buddhists do not worship, because Buddhism is not a religion. It is a way of life, often couched in symbolic terms, but there are no deities to worship. That being said, a MEDITATION center is called a wat.
A Buddhists place of worship is also called a Temple
A shrine or temple.
A monk or a nun usually leads the services. The original term for a monk was bhikkhu, which is still used by the Theravadins, but nowadays different countries and schools have their own terms.
An Imam
Buddhism followers worship in temples or they can worship in shines which is a place set aside in the home for prayer and devotion