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Overall , the utilization of starch as a natural binder system in SFF scaffolds was found to improve both compressive strength and in vitro biocompatibility .
 starch, as, binder, scaffolds, compressive strength, biocompatibility
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 starch, as, binder, scaffolds, compressive strength, biocompatibility