Gone astray is a phrase commonly used to describe someone who has veered off course, lost their way, or made a mistake. There are numerous synonyms for this phrase, including misplaced, misguided, erring, wayward, and wandering. These words can be used interchangeably with gone astray to describe someone who has made a misstep and needs to find their way back to the right path. Additionally, other terms like lost, confused, or puzzled can be used to describe situations where someone may have gone astray due to a lack of understanding or clarity. Choosing the right synonym depends on the context and situation in which the phrase is being used.