The phrase "with condition that" is often used to introduce a clause that needs to be met for a certain action to be taken or decision to be made. However, there are several synonyms that can also be used to express this idea, such as "provided that," "on the condition that," "so long as," "as long as," "if," "in the event that," and "assuming that." These alternatives can add variety to writing and make it more engaging. Therefore, writers should not be afraid to experiment with different ways to express conditions or requirements, as it can help to enhance the message they want to convey.