"Doeth a bit" is an archaic expression that means to do something or perform a task. In modern times, there are numerous synonyms for this phrase that can be used to convey the same message in more current language. Some examples include carrying out, executing, undertaking, accomplishing, completing, performing, and fulfilling. Other commonly used alternatives are achieving, finishing, handling, delivering, conducting, and implementing. Regardless of the context, using synonyms that better fit today's language is essential to avoid confusion and ensure clear communication with others. Therefore, it's important to expand one's vocabulary and keep up with modern language usage to use the right words to express oneself.