Finding synonyms for the word "condomless" can be a bit challenging as it is a pretty specific word that refers to sexual activity without the use of a condom. However, some options include unsafe sexual activity, unprotected sex, risk-taking behavior, and barebacking. It is important to note that while some people may argue that "barebacking" specifically refers to anal sex without a condom, the term has been used more broadly to describe any type of unprotected sex. Ultimately, the most important thing is to prioritize safety and take measures to prevent the spread of sexually transmitted infections.