The phrase "conflict with" denotes a disagreement or incompatibility between two or more parties. There are several synonyms for this phrase that can be used to convey similar meaning. For example, "clash with," "dispute with," "oppose," "contradict," "challenge," "oppose," and "quarrel with" can all be used to describe a situation where two parties are in disagreement. Similarly, "struggle with," "combat," "contend," and "battle against" can be used to describe an ongoing disagreement or struggle between two opposing forces. Overall, these synonyms can be used to describe a range of situations where there is a lack of agreement or compatibility between two or more parties.