What is another word for as an approximation?
Pronunciation: [az ɐn ɐpɹˌɒksɪmˈe͡ɪʃən] (IPA) 
As an approximation, synonymous phrases are used to refer to an estimated value or a rough estimate. One commonly used phrase for approximations is "roughly speaking." Another synonymous term is "more or less," both of which imply an indefinite approximation without precision. The phrase "ballpark figure" is frequently used to define a rough estimate of the cost, size, or amount required for a task. "Approximately" is another term that can substitute for "as an approximation," providing an estimate without absolute certainty. Lastly, the term "about" can be used synonymously to imply a close approximation, such as "about 50%" or "about three hours".
