The phrase "was good for" refers to something that has a positive impact or benefit. There are several synonyms for this phrase, including "beneficial," "advantageous," "helpful," "useful," "profitable," and "productive." These words can be used interchangeably with "was good for" in a variety of contexts, including discussing the benefits of certain foods, the positive outcomes of exercise, or the advantages of a particular job or career path. By using these synonyms, you can add variety and depth to your language and communicate with greater precision and accuracy.