"Discoursing" is a verb that means to speak or write at length on a particular topic. Synonyms for this word include expound, pontificate, orate, lecture, and explicate. All of these terms denote a kind of conversation or discourse that is intended to convey information or insight on a particular subject.
Other words that are related to "discoursing" might include "debating," "conversing," or "dialoguing," which all suggest a more interactive exchange of ideas and opinions. "Ranting," "raving," or "jabbering," on the other hand, imply an uncontrolled or excessive form of discourse that may not be particularly informative or productive. Regardless of the word used, effective communication relies on clarity, precision, and an ability to engage the audience or listener.