Text Page Builder with Spinning

I would like an application that will allow the user to define a set of variables (to be assigned to "reserve words") and then combine different variations of sentences to form unique paragraphs. The sentences will also contain spinnable text using a format similar to this [spun|varied|cycled] in which it will select one of the words within the square brackets and separated by pipes. Finally, the resulting paragraphs will be placed under distinct headings within a text document. This is NOT a Web page builder. It only builds simple text pages. The details are attached.