Antonyms are words that are opposite in meaning to a given word. In the case of "Leukemia Lymphoma Virus II Antigens Human T Cell", it can be challenging to find antonyms, as this is a technical term used in medical research. However, some possible antonyms for this phrase could include words such as "health," "well-being," "non-disease," "non-cancerous," "non-viral," "non-lymphoma," "non-leukemia," "nontoxic," "non-pathogenic," and "non-harmful." While these words may not directly relate to the original term, they offer a contrasting perspective on human health and medical conditions.