When you want to express that you discovered something, there are many synonyms for the phrase "found out". One option is "uncovered" which implies that you have revealed something that was previously hidden. Alternatively, you might consider using "detected" to suggest that you have identified something subtle or difficult to perceive. You could also use "unearthed" to convey the sense that you have dug up something that was buried or forgotten. Other possible synonyms for "found out" might include "learned", "discovered", "revealed", "acquired", or "unveiled". Each of these options captures a slightly different nuance or connotation, allowing you to tailor your language to best suit your intended message.