Spondylitis-chronic, progressive disease of the joints, accompanied by inflammation and stiffening. It is characterized by a "bent forward" posture caused by stiffening of the spine and support structures. Manifestations of this disease may be confused with the arthritis of lyme disease.

Spondylosis-degenerative changes of bones in the neck that place pressure on merves and muscles to the arms, legs and bladder.


I hope this helps. I got the definitions from a symptom and illness book.