Antonyms for the word corkscrews can be straight, linear, or erect. These words indicate a lack of twist or spiral, which is the defining characteristic of corkscrews. Other antonyms for corkscrews could be stiff or rigid, which suggests a lack of flexibility or suppleness. In addition, antonyms for corkscrews might include smooth, even, or unbroken, as these terms suggest a lack of bumps or knots in a surface. While there are many antonyms for corkscrews, each of them highlights a different quality or characteristic that contrasts with the twisting motion of a corkscrew.