There are several synonyms for the common term "sexually-transmitted disease" (STD). These include sexually-transmitted infection (STI), venereal disease, genital infection, and sexually-acquired infection (SAI). These terms all refer to the spread of infections through sexual contact, including vaginal, anal, and oral sex. While some infections can be treated and cured with antibiotics, others are lifelong or can lead to serious health complications if left untreated. It's important for sexually active individuals to practice safe sex, get regular STI testing, and seek medical attention if they experience any symptoms or suspect they may have been exposed to an infection.