Whitetail is a common term used to refer to deer species that have a characteristic bright white underside of their tails. However, there are many synonyms for this term depending on the different deer species, gender, and geographical location. Some of the most commonly used synonyms for whitetail include mule deer, black-tailed deer, sitka deer, fallow deer, roe deer, and sika deer. While these animals may have different characteristics and habits, they share the same genus as whitetail deer and are generally hunted for sport or food. Hence, it's important to be familiar with these synonyms to avoid confusion and accurately refer to these majestic animals.