— amazing
— arresting
— astonishing
— astounding
— awe-inspiring
— awesome
— awful
— awing
— baronial
— breathtaking
— brilliant
— dazzling
— dramatic
— effective
— effectual
— efficacious
— expansive
— eye-popping
— formidable
— fulgurant
— fulgurous
— gallant
— glorious
— grand
— grandiose
— heroic
— imperative
— imperceptive
— important-looking
— imposing
— imprecate
— imprecation
— imprecise
— impregnable
— impregnate
— impregnated
— impress
— impress upon
— impressed
— impressible
— impression
— impressionable
— imprisoned
— improbable
— improve
— improving
— improvised
— imprudence
— lofty
— magnificent
— majestic
— mind-boggling
— moving
— noble
— palatial
— proud
— sensational
— signal
— spectacular
— splendid
— staggering
— stately
— striking
— stunning
— stupefying
— thundering