Red tiger is a term often used to describe different things, from a species of orchid to a type of alcoholic beverage. However, if you are looking for synonyms for red tiger in its most common context, you could use phrases like crimson feline, scarlet predator, or even ruby panther. Other possible options could include the fiery cat, the ruddy wildcat, or the burgundy big cat. Ultimately, the choice of synonyms will depend on the desired tone or emphasis of the description, whether it's ferocity, elegance, or simply a unique coloring.