The phrase "blow great guns" is an idiom that is commonly used to describe a situation where something is happening on a grand and impressive scale. Here are some synonyms that can be used in place of "blow great guns": - Thunderously: This word can be used to describe a situation that is loud and dramatic, just like the sound of thunder. - Dramatically: If something is happening in a dramatic way, it is likely to catch your attention and be memorable. - Spectacularly: This word implies that something is happening in a grand and impressive way, like a fireworks display. - Magnificently: When something is happening magnificently, it's on an awe-inspiring scale that leaves people in awe. - Astonishingly: This word suggests that something is happening that is surprising and impressive.