battlefield or battlegroundnoun

• retool
• retort
• retouch
• retrace
• retract
• retractile
• retraction
• retractor
• retrain
• retread
• retreat
• retrench
• retrial
• retribution
• retrieve
• retriever
• retro
• retro-
• retroaction
• retroactive
• retrocede
• retrochoir
• retrofit
• retroflex
• retroflexed