"Stand with" is a phrase that denotes support, solidarity, and alliance with someone or something. To express the same sentiment, some synonyms can be used. For instance, "stand behind," "align with," and "back up" can all convey the ideas of solidarity and support. "Come alongside," "stand next to," and "accompany" are other synonyms that imply standing beside someone or something in a supportive manner. "Champion," "defend," and "advocate" are other suitable words that denote standing with someone by actively defending and promoting their cause. Using these synonyms can make your writing more varied and engaging while accurately conveying your intended meaning.