Over-ride is defined as taking control or canceling out something that has been previously established. When looking for synonyms for this word, there are many options to choose from. One could use words such as annul, cancel, negate, overturn, veto, or revoke. Alternatively, you could use phrases such as take priority over, take charge, or assume control of. When writing formally, it is important to have a range of synonyms for over-ride as it helps to convey an understanding of the English language and demonstrates a wide vocabulary skill set. Ultimately, using synonyms for over-ride can help to add greater depth and complexity to your writing, allowing you to express yourself more clearly and effectively.