When it comes to finding synonyms for "salle d'attentes," there are a few options to consider. In English, this phrase translates to "waiting room," which is a common term that can be used in many contexts. However, there are also more specific alternatives, such as "reception area," "lobby," or "foyer." Depending on the setting, other phrases may also be appropriate, such as "patient lounge," "departure lounge," or "transit lounge." Ultimately, the best synonym to use will depend on the context of the situation, as well as the preferences of the speaker or writer.