Template or a Template

I’m looking for a “template” (I think this word means something different in wordpress) plugin where I can create similar looking posts but be able to change some of the “static” information on the “template” and have it change all of the posts. For example, if I misspelled a word on the template and created 15 posts by duplicating it, I can correct the spelling on the template and it will update all of the posts. It would be great if the plugin could create multiple templates for posts and pages.