adj. 25B6; adjective
I swear by almighty God : ALL-POWERFUL, omnipotent, supreme, pre-eminent.
(informal) an almighty explosion : VERY GREAT, huge, enormous, immense, colossal, massive, prodigious, stupendous, tremendous, monumental, mammoth, vast, gigantic, giant, mighty, Herculean, epic; very loud, deafening, ear-splitting, ear-piercing, booming, thundering, thunderous; informal whopping, thumping, astronomical, mega, monster, humongous, jumbo; Brit. informal whacking, ginormous.
powerless, insignificant.