The inflamed appendix is a common medical condition that requires immediate attention. A few common synonyms for an inflamed appendix include appendicitis, acute appendicitis, and inflamed vermiform appendix. Moreover, other medical and formal terms describing the same condition include acute inflammation of the appendix, acute appendicular inflammation, and acute cecal inflammation. Additionally, some informal or slang synonyms for an inflamed appendix may also include belly pain, tummy troubles, and stomachache. However, it is essential to seek medical attention immediately as an inflamed appendix, if left untreated, may lead to severe complications like the rupture of the appendix, causing infection and peritonitis.