One-horned is commonly used to describe the Indian Rhinoceros, but there are alternative words that can also be used to describe the animal. Some synonyms to consider may include unicorn, monorhino, single-horned, and rhinocorn. Unicorn refers to a mythical animal with a single horn, while monorhino is the scientific term for having only one horn. Single-horned is also a simple and straightforward adjective that can easily replace one-horned. Rhinocorn is a playful combination of rhino and unicorn, which can be used in a more creative context. Ultimately, there are many ways to describe the unique characteristic of having a single horn, each with their own nuances and connotations.