There are multiple synonyms that can be used for the phrase "out of foolishness," such as "out of stupidity," "due to recklessness," "because of ignorance," "through folly," "owing to imprudence," "because of thoughtlessness," and "due to lack of sense." Each of these synonyms conveys the same notion of acting without wisdom or proper judgment, and instead making decisions based on instinct or without fully considering the consequences. Whether used in a serious or lighthearted context, these synonyms serve as valuable alternatives to express the same concept of actions taken out of foolishness.