The phrase "whole worlds" can be used to describe a vast amount of things all at once. Some synonyms for this phrase include "everything," "all-encompassing," "totality," "entirety," "completeness," and "wholeness." The phrase can also be described as "the entirety of existence," conveying the idea that every aspect of the world is included. "Whole worlds" can also be replaced with "global," "universe," "cosmos," or "realm." These synonyms all express the idea of something being all-inclusive and all-reaching, which makes them useful in different writing contexts. Whatever the synonyms used, the idea behind the phrase remains: describing a vast extent of everything.