There are several synonyms for the phrase "Center of the Universe". Some of these synonyms include "epicenter", "hub", "nucleus", "omphalos", and "axis mundi". Each of these words carries a different connotation, but all refer to a place or entity that occupies a central or pivotal position. "Epicenter" is often used in the context of earthquakes, referring to the point on the earth's surface directly above the seismic activity. "Hub" refers to a central point of activity or communication, while "nucleus" refers to the central part of an atom or cell. "Omphalos" refers to a religious or mythological center, while "axis mundi" is the central axis of the world in various belief systems.