The phrase "for that" can be replaced with a variety of synonyms to add variation and clarity to writing or speech. Some options include "on account of," "due to," "because of," "for the purpose of," "with regard to," and "in relation to." The context of the sentence or paragraph in which the phrase is used may dictate which synonym is most appropriate. For example, "in relation to" might work better in a more formal context, while "for the purpose of" might be more suitable for a casual conversation. Experimenting with synonyms can help writers find their voice and convey complex ideas more effectively.