What is another word for come together as one voice?
Pronunciation: [kˈʌm təɡˌɛðəɹ az wˈɒn vˈɔ͡ɪs] (IPA) 
The phrase "come together as one voice" is often used to emphasize the importance of unified action. There are many synonyms for this phrase, all of which convey the idea of people uniting for a common cause. Some possible synonyms include "unite in solidarity," "join forces," "rally together," "stand as one," and "band together." Other similar phrases might include "work together," "act in harmony," "coordinate efforts," or "collaborate toward a common goal." No matter how it is expressed, the underlying meaning remains the same: people can achieve great things when they come together and work towards a shared objective.
