"So that" is a common transitional phrase used to indicate purpose or intention. However, there are numerous synonyms that can be used to convey the same meaning such as "in order that", "with the intention of", "for the purpose of", "to the end that", "with a view to", "with the aim of", "with the goal of", "to ensure that", "to facilitate", "for the sake of", "in the interest of", and "with the hope that". Utilizing a variety of transitional words and phrases in writing can make the language more precise and engaging, so incorporating these alternatives can help make writing more fluent and varied.