When it comes to medical research and diagnostics, "tissue sample" is a common term that refers to a small portion of tissue taken from a patient's body for laboratory testing. However, there are several other synonyms that can be used interchangeably with this term. For instance, "biopsy" is a well-known medical term that relates to the process of taking a sample of living tissue for further analysis. "Specimen" is another word that can be used to refer to tissue samples, and it encompasses different body fluids, cells or tissues collected during diagnostic procedures. Other synonyms for "tissue sample" include "tissue biopsy," "cell sample," and "tissue block".