The phrase "soft underbellies" is commonly used to refer to vulnerabilities and weaknesses. Some synonyms for this phrase include Achilles' heel, weak spots, vulnerabilities, susceptibilities, flaws, limitations, and weaknesses. These terms are often used to describe the areas in which an individual or organization is most prone to attack or failure. By identifying and addressing these weaknesses, individuals and organizations can strengthen themselves and become more resilient. Synonyms for "soft underbellies" can also be used metaphorically to describe emotional vulnerabilities or sensitive topics. It's important to address and work through these vulnerabilities in order to become more confident and resilient individuals.