When you need to express that something is "also true" there are many different synonyms you can use to convey the same message. Some possible options include "equally valid," "likewise factual," "just as correct," or "similarly accurate." Other phrases that might work include "in addition," "Moreover," "Furthermore," or "besides." No matter which synonym you choose, it's important to remember that the goal is to emphasize the veracity of the statement you're making. By using a synonym for "also true," you can add nuance and clarity to your language and ensure that your point is fully understood.