Correct spelling for the English word "Superstruction" is [sˌuːpəstɹˈʌkʃən], [sˌuːpəstɹˈʌkʃən], [s_ˌuː_p_ə_s_t_ɹ_ˈʌ_k_ʃ_ə_n] (IPA phonetic alphabet).
The term "superstruction" does not have an established etymology or a widely recognized usage in the English language. It appears to be a combination of the prefix "super-" meaning "above" or "over" and the word "struction" which is not a common or recognized suffix. Therefore, it is likely that "superstruction" is a relatively new or specialized term in a specific field or context that does not have a well-documented etymology.