A will that is made orally and later documented in writing is best described as:

A will that is made orally and later documented in writing is best described as a nuncupative will. Nuncupative wills are typically spoken, often created under particular circumstances such as on a deathbed, where a person expresses their final wishes verbally to witnesses. The documentation of these oral declarations in writing serves to provide legal recognition and evidence of the individual's intentions.

In contrast, a testamentary will is a formal document that reflects a person's wishes regarding the distribution of their assets upon death but is not necessarily created from oral declarations. A living will primarily pertains to medical decisions and end-of-life care, rather than the distribution of assets, while a statutory will is one that adheres to specific state laws and often follows a pre-determined format. Therefore, the correct term for a will that starts as oral and is later reduced to writing is indeed a nuncupative will.