The first presenter was garrulous, the second loquacious. (garrulous: loquacious, voluble, chatty; loquacious: talkative, voluble, garrulous) The instructor didn't care what they called themselves as long as they finished before the weather bulletin. He asked for conciseness. (conciseness: concision, succinctness, brevity) They offered him a discourse on the merits of a terse style and the perils of excessive terseness. (discourse: disquisition, talk, address; terse: concise, succinct, brief; terseness: brevity, conciseness, succinctness)
He handed each an index card. One man began to expatiate on his technique. (expatiate: elaborate, expand, expound) The other immediately made a digressive remark about the old microphones. (digressive: rambling, discursive, wandering) Both had excellent articulation. (articulation: enunciation, diction, pronunciation) Neither could articulate a single reason for the cards. (articulate: express, formulate, phrase) Their articulateness had been the reason for hiring them. (articulateness: fluency, eloquence, expressiveness) It was becoming a detriment to listeners who wanted the time of the last bus. (detriment: harm, damage, disadvantage)
The instructor switched on the live lamp. A caller said her boy had missed his stop. The first man gave the junction. The second gave the bus number. Six words between them brought a reply from the driver. When the instructor asked what had changed, both men looked at the live lamp. For once they had pictured somebody waiting at the other end.