The phrase "both together" can be replaced with various synonyms depending on the context and tone of the sentence. Some options include "simultaneously," "in unison," "at the same time," "jointly," "concurrently," "as one," "in harmony," "side by side," "hand in hand," and "in tandem." These synonyms can be used in a variety of scenarios, from describing the synchronization of two dancers to explaining how two people are working together on a project. Choosing the appropriate synonym can add depth and clarity to your writing, making it more engaging and effective.