A loquacious co-passenger can be described in a variety of ways using synonyms for the word loquacious. These synonyms are talkative, chatty, garrulous, voluble, and verbose. A talkative co-passenger loves to have conversations and can be friendly, but sometimes they can be difficult to interact with if they do not give others a chance to speak. A chatty co-passenger enjoys casual conversation and often initiates dialogue to pass the time. A garrulous co-passenger talks incessantly and can be disruptive, while a voluble co-passenger may have much to say but is easier to converse with. Lastly, a verbose co-passenger uses an excessive amount of words to communicate their thoughts.