Is it ensure, insure, or assure?
homeopathy ho·me·op·a·thy (hō'mē-ŏp'ə-thē)
A system for treating disease based on the administration of minute doses of a drug that in massive amounts produces symptoms in healthy persons similar to those of the disease.
A system of treating disease in which small doses of certain substances are administered; in large doses, given to a healthy person, these substances would produce the symptoms of the disease. The principles of homeopathy do not enjoy widespread acceptance in the medical community.