"Make as goes along" is a phrase that means to create or complete something as one progresses through a task or project. Despite its usefulness, it's always good to have a varied vocabulary. Synonyms for this phrase include improvisation, on-the-fly, as-needed, winging it, ad hoc, spur-of-the-moment, and extemporize. These synonyms speak to the same sense of creating something on-the-spot without a predetermined plan, and all are useful in different contexts. Using synonyms not only adds variation to writing, but also allows writers to be more precise with their language and to avoid repetition.