Alpha-omega is a phrase that refers to the beginning and end of something, often used to describe God. However, there are many other synonyms that can be used to convey the same meaning. Such synonyms include "first and last," "beginning and end," "start and finish," "commencement and culmination," "initial and final," "preliminary and ultimate," and "primary and ultimate." These synonyms can be used interchangeably to describe the ultimate and complete extent of something. No matter which synonym is chosen, they all express the same idea of totality, completeness, and wholeness.