"Sticking up for" implies an act of defending or supporting someone or something in the face of opposition or criticism. Some synonyms for "sticking up for" include: advocating, standing up for, supporting, championing, defending, protecting, endorsing, backing, and promoting. Each of these words carries a similar meaning of defending or supporting something that is important to you. These synonyms can be used interchangeably, depending on the context and tone of the sentence. Whether you're trying to rally support for a cause, or standing up for a friend in need, using synonyms for "sticking up for" can help convey your message with more variety and impact.