A wagering contract or a risky contract. It applies to all those contracts which may bring a reward without any human effort or to contracts that involve non-business risks.
Mudarib
Awqaf al-nuqud
Al-‘ushur
Al-muqarid
Al-maisir
Al-hiqqah
Al-hima
Al-’amanah
Al-bai‘ al-batil
Al-rizq