Co-occur with is a phrase that means things happening simultaneously or together. It is often used in scientific research and technical writings. However, there are other synonyms for this phrase that can be used interchangeably. Some of the synonyms for the phrase co-occur with include coincide, concur, align, correspond, and overlap. Each of these words can be used to refer to two things happening together or at the same time. Furthermore, linguists and writers have to choose the right synonym according to the context, mood and tone of the sentence. By using the appropriate synonym, the writing becomes more coherent and articulate.