The crossword solution for the term 'therapy prefix' is AROMA, which is a five-letter word. AROMA therapy is a type of alternative medicine that uses essential oils to promote physical and psychological well-being. It is believed that the AROMA of these oils can help to reduce stress, improve mood, and even provide relief from physical pain. Aromatherapy is often used in conjunction with other forms of therapy, such as massage or acupuncture.