Experimental samples are essential in conducting scientific research. However, using the same term repeatedly can make writing dull. To add some variety to your writing, you can use synonyms. Common synonyms for experimental samples include test, trial, specimen, model, prototype, and exemplar. Additionally, you can use terms such as experimental units, study participants, or data sets, depending on the nature of your research. By incorporating synonyms into your writing, you can strengthen your content's readability and make it more engaging. It's also a good practice to use a diverse vocabulary to avoid repetition and ensure that your readers stay engaged in your work.