Direct Opposites:
* Error-making: This directly contradicts the aim of proofreading, which is to find and correct errors.
* Neglecting: This refers to ignoring the need for careful review and correction.
More nuanced opposites:
* Ignoring: This emphasizes the act of not paying attention to potential errors.
* Overlooking: This focuses on missing errors during a review process.
* Misreading: This emphasizes the act of interpreting text incorrectly.
The most appropriate antonym depends on the specific context of your use. For example, if you're discussing the process of writing, "error-making" might be the best fit. If you're talking about the lack of attention to detail, "neglecting" or "ignoring" might be more suitable.