Mock-ups are a representation of a design or a product created to provide an idea about its look and feel. The antonyms for the word "mock-ups" are final product, finished design, real-life product, tangible item, real prototype, and actual product. As opposed to mock-ups, these antonyms are the actual and final versions of a product or design. Whereas mock-ups are used for experimentation and idea development, the antonyms are used for testing, marketing, and actual usage. Moreover, mock-ups are mostly created in the initial stages of a project, while antonyms come towards the end of the project or design.