To conclude is an important phrase in writing and speaking. It signals the end of a thought, a discussion, or an argument. If you want to avoid using this phrase repetitively, you may use its synonyms. Some of these synonyms are "to sum up," "to wrap up," "to finalize," "to terminate," "to close," "to finish," and "to bring to a close." These synonyms all convey the same meaning as "to conclude." They are useful to make your writing or speaking more diverse and interesting. However, it is important to note that each of these words has a slightly different nuance, so choose the one that best fits your intended meaning.