Single-stranded is a term used to describe a molecule or substance that contains only one strand or chain of molecules. When it comes to biology and genetics, this term is often used in reference to DNA and RNA. However, there are several other terms that can be used as synonyms for single-stranded. These include "unpaired," "monomeric," "solitary," "individual," "discrete," and "univalent." Each of these terms conveys the idea of a molecule or structure that is not connected or paired with another, demonstrating the importance of these descriptors in understanding biological systems and processes.