The phrase "was a part" can be replaced by numerous synonyms that convey the same meaning. Some of these synonyms include "belonged to," "was involved in," "played a role in," "contributed to," "took part in," "had a hand in," and "was a component of." Using these synonyms can help add variety and richness to your writing, making it more engaging for your audience. Additionally, using synonyms can help to clarify your meaning and prevent incorrect interpretations of your message. So, the next time you need to say that something "was a part" of something else, consider using one of these alternative options instead!