"雷{かみなり}" is thunder, or lightning, or both? * In daily conversation, " **** " means both the lightning and the accompanying thunder as a single phenomenon, right? * At night, I sometimes see lightning on the horizon, but no thunder. That is , right? * All the time, I hear the thunder, but not see the lightning. That is also , right? * Does "" sound like natural Japanese? * Does "" sound like natural Japanese?

Yes, refers to both the lightning and the sound caused by it.

If you need to distinguish, the specific term for the visible discharge of the light is , and the specific word for the sound is . Although these words often appear in news media and scientific papers, we usually just use in everyday conversations.

As for the last two questions, the natural ways to say them are "( **** )?" and "( **** )?". "" is often omitted in conversations, and we don't use "" there.