Soluble RNA is an essential biological molecule that plays a vital role in protein synthesis. It is also commonly referred to as transfer RNA (tRNA), which carries amino acids to the ribosome during translation. Additionally, soluble RNA is sometimes called sRNA, a term used to describe small non-coding RNAs that regulate gene expression and control cellular processes. Another term for soluble RNA is ribosomal RNA (rRNA), which is a structural component of the ribosome. Lastly, soluble RNA can also be referred to as messenger RNA (mRNA), which carries the genetic information from DNA to the ribosome. Overall, these various synonyms help to capture the diverse functions and importance of this crucial molecule in biology.