rantEnglishOxford American Thesaurusrant verb she was still ranting on about the unfairness of it all: hold forth, go on and on, deliver a tirade, rant and rave, fulminate, sound off, spout, pontificate, trumpet, bluster, declaim; shout, yell, roar, bellow; informal mouth off; rare vociferate.noun he went into a rant about the people who were annoying him: tirade, harangue, diatribe, broadside, verbal onslaught; rare philippic.