地雷【じらい】
land mine, topic that sets someone off, sensitive topic, taboo topic, trigger, something that seems fine at first but turns out to be very bad (e.g. product, business), booby trap, pitfall
雷【かみなり】
lightning, thunder, thunderbolt, god of thunder, god of lightning, anger, fit of anger
雷雨【らいう】
thunderstorm
落雷【らくらい】
lightning strike, lightning bolt
魚雷【ぎょらい】
torpedo
雷鳴【らいめい】
thunder, thunderclap, crash of thunder