Olisthesis (synonym olisthy) is a term that more explicitly denotes displacement in any direction. Forward or anterior displacement can specifically be called anterolisthesis. Anterolisthesis commonly involves the fifth lumbar vertebra. Backward displacement is called retrolisthesis. Lateral displacement is called lateral listhesis or laterolisthesis. A hangman's fracture is a specific type of<unk>  where the second cervical vertebra (C2) is displaced anteriorly relative to the C3 vertebra due to fractures of the C2 vertebra's pedicles.
Spondylolisthesis
Retrolisthesis
Discitis
Disc protrusion
Spinal fracture
Vertebral compression fracture
Fibrous ankylosis
Vertebral osteomyelitis