There are a number of synonyms for the word "microreentrant" depending on the context of its use. In the field of cardiology, the term refers to a condition where electrical signals in the heart create a circular motion resulting in abnormal heartbeats. Synonyms for this would include atrial flutter, supraventricular tachycardia (SVT), and reentrant ventricular arrhythmia. In the field of telecommunications, microreentrant can mean a type of fiber-optic cable with numerous tiny loops which allow light to bounce back and forth. Synonyms for this could be microloop cable or loop-back fiber optic cable. Overall, synonym choices for microreentrant will depend on the field of study and use case.