The term 'Speaker on a Soapbox' can be summarized as an ORATOR, which is a six-letter word. An ORATOR is someone who speaks in a public setting, usually to deliver a persuasive speech. The phrase 'Speaker on a Soapbox' is often used to describe someone who stands on a box or crate to make their speech, as if they were standing on a soapbox. This phrase is often used to describe someone who is passionate about their beliefs and is willing to speak out in a public setting.