To convey a message by nonverbal means:
To adhere or become legally effective, especially in connection with something or upon some event. For example, certain rights and responsibilities attach to becoming a parent.
To act (a theatrical role) with insufficient emphasis or too great restraint
To deliver a harangue.
To give formal notice of the ending of (a treaty, armistice, etc.)
To give vent to angry disapproval; protest vehemently.
To lecture is defined as to deliver a speech or to talk to someone about why he or she was wrong.
To sum up or conclude a speech
To pontificate is to express your opinion in an annoying way, often because you go on too long or because you are too much of a know-it-all.
To talk or say in a loud, wild, extravagant way; declaim violently; rave
To rave is defined as to speak or move violently or wildly, particularly in appreciation of something.
To form (a word) with the mouth soundlessly
To write the destination on (a letter or parcel)
To list or enumerate:
To speak in a loud, pompous, or prolonged manner
Find another word for declaim. In this page you can discover 20 synonyms, antonyms, idiomatic expressions, and related words for declaim, like: speak, attach, underact, proclaim, harangue, address, recite, denounce, inveigh, lecture and orate.