The phrase "as good as" implies a certain level of quality or proficiency. However, there are many other words or phrases that can be used to convey a similar meaning. Some examples of synonyms for "as good as" include "nearly," "virtually," and "almost." Other options include "comparable to," "equal to," and "on par with." Additionally, "effective as," "competent as," and "adequate as" can be used to express similar ideas. Depending on the context and tone, different synonyms may be more appropriate. Ultimately, having a varied vocabulary of synonyms can help to enhance your writing and communication skills.