Potential answers for "Groundbreaking invention?"

⭐⭐⭐⭐ RAKE
⭐⭐⭐⭐ HOE
⭐⭐⭐⭐ PLOW
⭐⭐⭐ PICKAXE
⭐⭐⭐ TILLER
⭐⭐ SEMINAL
⭐⭐ SEISMIC
⭐⭐ RADICAL

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