Mind-boggling adjective – Causing great emotional or mental stimulation. Uncommon and mind-boggling are semantically related. In some cases you can use "Uncommon" instead an adjective phrase "Mind-boggling".
Uncommon adjective – Being out of the ordinary. Mind-boggling and uncommon are semantically related. Sometimes you can use "Mind-boggling" instead an adjective "Uncommon". informal substitute Nearby Word: uncommonly