An "oasis of openness" refers to a space that is welcoming, inclusive, and safe for individuals to be their authentic selves. If you're searching for synonyms for this term, some words to consider include sanctuary, refuge, haven, safe haven, solace, shelter, retreat, and harborage. Each of these words carries the same connotation of a space where people can feel free to express themselves without judgment or fear. These types of spaces are crucial for fostering diversity, equity, and inclusion and are essential in creating a better, more empathetic world.