Great guns is a phrase that means doing something with full force or enthusiasm, commonly used during a celebration or achievement. Some synonyms of great guns include full throttle, full blast, full steam ahead, all out, go all the way, hammer and tongs, flat out, whole hog and pull out all the stops. These terms convey the same meaning of going all-in and not holding back. It is essential to choose the most appropriate synonym for the specific context, as different phrases have variations in tone and intensity. Regardless, these synonyms for great guns add excitement and energy to any conversation or situation.