The word "chemo-therapies" refers to medical treatments that use chemicals to inhibit the growth of cancerous cells. The opposite of chemo-therapies would be therapeutic interventions that do not involve chemical agents. One such treatment is radiation therapy, which uses targeted radiation to kill cancer cells. Another antonym would be immunotherapy, a relatively new technique that harnesses the power of the immune system to fight cancer. Surgery, where the cancerous tissue is completely removed, is also a non-chemo-therapeutic option. Finally, complementary and alternative therapies, such as holistic medicine, acupuncture, and massage, can be used in conjunction with traditional treatments to help manage symptoms and improve overall wellbeing.