Fameless infinity can be a difficult concept to grasp, but there are several words that could be used as synonyms for the term. One possible alternative is "nameless eternity," which suggests a timeless and vast expanse that is not defined by any particular entity or existence. Another option could be "forgotten infinity," which implies that this boundless space has been overlooked or abandoned by those who might otherwise have acknowledged its existence or significance. Ultimately, any synonym for fameless infinity will evoke a sense of vastness, endlessness, and a lack of recognition or acknowledgement.