Synonyms and related words :
analgesic, anesthetic, bloodcurdling, deadening, dulling, exceptional, extraordinary, fabulous, hair-raising, indescribable, ineffable, legendary, marvelous, mythical, narcotic, noteworthy, numbing, paralyzing, petrifying, phenomenal, portentous, prodigious, remarkable, stunning, stupendous, terrifying, terror, terror-bearing, terror-breathing, terror-breeding, terror-bringing, terror-fraught, terror-giving, terror-inspiring, terror-striking, terrorful, terroristic, unexampled, unparalleled, unprecedented, unspeakable, wonderful