Potential answers for "Castaway's signal"

⭐⭐⭐⭐ FLARE
⭐⭐⭐⭐ SOS
⭐ TURN
⭐ SONAR
⭐ SMOKE
⭐ ATTENUATOR
⭐ DASH
⭐ USHERIN
⭐ ALERT

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