There are various ways one can describe promiscuity without using the phrase "were promiscuous." Some synonyms that could be used to describe someone who is promiscuous include licentious, lewd, wanton, debauched, loose, and dissolute. Others might use words such as reckless, irresponsible, and immoral. Some might also use phrases like "had numerous sexual partners" or "engaged in frequent casual sex." The use of synonyms is always a useful tool to vary the language and bring nuance to the description of a character, event, or situation. It can also help writers avoid repetition and improve the overall quality of their written work.