Potential answers for "Subject in an experiment"

⭐⭐⭐⭐ GUINEAPIG
⭐⭐⭐ ESP
⭐⭐⭐ RAT
⭐⭐⭐ GUINEA
⭐⭐⭐ TESTEE
⭐⭐⭐ LABRAT
⭐ ROMANEMPIRE

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