What is the difference between an oncology nurse practitioner and an oncology nurse?

Practitioner. Nurse practitioner can see you and can prescribe treatment while oncology nurse usually deliver chemotherapy or radiation but in actual she can not prescribe tratment by herself.
Not much. Both of these designations imply training in oncology nursing besides being a rn which is a general nursing degree(bs). Most of nurse practioners are ms and have clinical practice expereince in oncology.