Knockoffs are unauthorized copies or imitations of branded products, which are often sold at lower prices in the market. However, there are several antonyms that can be used to describe the opposite of knockoffs. Genuine, authentic, original, and legitimate are some of the examples of antonyms for knockoffs. Genuine products are those that are made by the original manufacturer and are sold under their brand name. Authentic products are those that are made by authorized sellers and dealers, while original products are the first of their kind to be made. Legitimate products are those that are made and sold by authorized dealers with the proper licenses and permits. Therefore, if you want quality products, go for the antonyms of knockoffs.