sara / sera / serra [ˈsɛrə]
sara (sarah) – n. – 1. a painted trillium - a perennial herb (Trillium undulatum) with a showy solitary flower with purple-streaked petals; 2. a radio transmitter used by marooned people to signal rescue vessels (this is actually an acronym)
sera – n. – sing. something that is at close quarters; pl. of serum, the watery, non-cellular portion that remains after coagulation of blood etc.
serra – n. – 1. a fabulous marine monster; 2. something with a jagged, sawlike edge