The phrase "doubtful advantages" refers to benefits or gains that are uncertain or questionable. Synonyms for this phrase include dubious benefits, questionable gains, uncertain perks, and equivocal advantages. Other alternatives that convey a similar idea include risky advantages, ambiguous benefits, and dubious rewards. These terms suggest that the advantages in question may not be worth pursuing or may come with significant potential downsides. When evaluating potential advantages, it is important to consider the level of risk involved and the likelihood of achieving the desired outcome. By exploring the nuances of language, we can gain a better understanding of the potential outcomes of our decisions.