Krafft-Ebing was a prominent Austrian psychiatrist and forensic expert during the late 19th and early 20th centuries. He is best known for his influential work, Psychopathia Sexualis, in which he catalogued and classified a wide range of sexual behaviors and deviations.
There are many different synonyms for the term Krafft-Ebing, as it can refer to both the man himself and his extensive body of work. Some possible alternatives might include "forensic psychiatrist," "sexual deviancy expert," or simply "sexologist."
Other related terms might include "sexual dysfunction specialist," "abnormal psychology researcher," or "expert in human sexuality." Ultimately, the term Krafft-Ebing is likely to be most closely associated with his groundbreaking contribution to the field of sexual psychology and his legacy as a pioneering researcher in this area.