Synonyms for the word "dark retreat" may include various phrases and expressions that refer to seclusion or isolation in the absence of external light. Such synonyms may include "lightless meditation," "meditation in darkness," "solitude in obscurity," or "blackout retreat." Other expressions that may be used to describe a similar idea include "enclosed retreat," "secluded contemplation," "monastic meditation," or "spiritual seclusion." Ultimately, the ideal phrase will depend on the specific context and goal of the retreat, as well as the preferences of the individual seeker. However, regardless of the phrase used, the underlying intention of a dark retreat is to cultivate inner stillness and clarity through disconnection from worldly distractions.