There are various synonyms for the phrase "on that ground." Some of the alternatives include on that basis, for that reason, in light of that, due to that, because of that, and hence. These phrases can be used in writing, speaking, or arguments to convey the same meaning as "on that ground." The selection of a particular synonym depends on the context, tone, and audience. Regardless of which synonym is chosen, the key is to articulate the connection between the premise and the conclusion in an effective and persuasive manner. By using synonyms, writers or speakers can add variety, clarity, and precision to their communication.