• Diver is an Irish surname.(Uí Dhuibhir in Irish)
• A diver is a person who practices scuba diving or surface supplied diving.
• A diver is the European name for a group of aquatic birds of the order Gaviiformes, in North America called loons.
• A diver is an athlete who practices diving in the sense of jumping or falling deliberately into water.
• The word DIVER was a British WWII armed forces code name for the German V1 flying bomb.
• A diver is one of 2 New Zealand fish: New Zealand sand diver or Long-finned sand diver.

With an ending S (but not plural):

• divers often is an adjective meaning "diverse, various" or "many and varied". Used in older English usage including the Authorized Version of the Bible or by Francis Bacon letters in 1679, or as in the phrase divers hands.

Taucher | Duiker