Tiercel is a word that is most often used to refer to a male falcon, specifically a male peregrine falcon. However, there are many other synonyms that can be used to describe this majestic bird. Some of the most common include tercel, hawk, kestrel, and sparrowhawk. These synonyms are often used interchangeably depending on the context in which the bird is being discussed. Other synonyms for tiercel include gyr, gyrfalcon, and saker, which are all different species of falcons. Whatever synonym is used to describe this beautiful bird, there is no doubt that it is an awe-inspiring creature that can be seen soaring the skies around the world.