"Worth one's while" is a popular phrase that indicates that something is valuable or beneficial enough for someone to take the time and effort to engage with it. There are many synonyms for this phrase, including "worth the effort," "worth the time," "worth one's energy," and "worth one's attention." Other synonyms could include "valuable," "rewarding," "worthy," "important," "significant," and "meaningful." These synonyms can be used interchangeably depending on the context in which the phrase is being used. Overall, the phrase "worth one's while" suggests that something is meaningful enough to invest in and can be a useful expression in many different situations.