Repressilator is a complex term used in molecular biology. It is a genetic circuit that involves three genes that create a feedback loop within cells. While there are not many direct synonyms for repressilator, one could use related terms to describe it. For example, one could use the term genetic regulatory system, which involves a set of genes that work together to regulate each other's expression. Other terms include genetic switch, gene oscillator or genetic toggle switch. These terms describe the same type of process that repressilator does, but may be easier to understand for those who are not familiar with molecular biology.