Potential answers for "Stuff refineries refine"

⭐⭐⭐⭐ OIL
⭐⭐⭐ ORE
⭐⭐ SMELT
⭐⭐ TWEAK
⭐⭐ RAREFY
⭐⭐ PROCESSINGPLANTS
⭐⭐ SIFT
⭐⭐ DISTILL

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