There are many synonyms for the term "unsuccessful persons" that can be used depending on the context and situation. Some examples include underachievers, underperformers, non-achievers, unsuccessful individuals, failures, and losers. These terms are commonly used to describe people who have not achieved their goals, whether it be academically, professionally or personally. It is important to note that these terms are often subjective and should be used with caution as they can be hurtful and damaging to an individual's self-esteem. Instead, it is recommended to focus on positive and constructive language, offering support and encouragement to help individuals reach their full potential.