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caustic soda

noun

• sodium hydroxide
• hydrated oxide
• hydroxide
• lye

sounds kind of like

• cast aside
• castigate
• cat suit
• catch out
• catchweed
• catechist
• catgut
• cathect
• chastised
• chitchat
• chute-the-chute
• city state
• city-state
• co-educate
• coeducate
• coyote state
• cytotoxicity