What is another word for marching cannon mouth?
Pronunciation: [mˈɑːt͡ʃɪŋ kˈanən mˈa͡ʊθ] (IPA) 
The phrase "marching cannon mouth" can be a metaphorical way to describe someone who speaks powerfully and forcefully. Some synonyms for this type of person could include a "boisterous speaker," a "loudmouth," or a "thunderous orator." Other options might be a "forceful debater," a "dynamic lecturer," or a "vociferous commentator." These words all capture the idea of someone who speaks in a way that commands attention, whether they are advocating for a cause, giving a speech, or expressing their opinions. In any case, a "marching cannon mouth" is someone who is not afraid to speak their mind and make an impact on the world around them.
