Combining the words "gym" and "mentor", makes for a highly effective and self explanatory domain
Gymentor has eight letters and three syllables. Leading companies using three syllable names include Toshiba, Sainsbury's and Nescafé.
Gymentor.com is a .com domain. Dot com domains are the most valuable top-level-domain in the world, used by famous websites like facebook.com. Owning a .com says that you own the word "gymentor" online.