This explosive blend of "rocket" and "abs" makes for a highly memorable, fitness focused domain name.
The word "RocketAbs" contains nine letters and three syllables. Leading companies using three syllable names include McDonald's, Toshiba and Mastercard.
Rocketabs.com is a dot com domain. Dot com domains are the most valued top-level-domain in the world, famously used by websites like facebook.com. Once you own a dot com, it will be much easier to rank for your own name in Google.