I have teeth but don't eat. You can put something into me, but I'm not a container. You can switch multiple of me, but I'm not a toggle. I'm irritating when someone grinds me. I'm preparing for something when I'm up. I'm preparing for landing when I'm down.

I can be used as a bolt or pin. I can hang, fasten, or mark a thing. If you suggest me during intercourse, you might be admired or called the worst.

I fit in sockets, and brighten the space, I sprout, then grow, then flower in place. A four-letter word, one few stop to think, Yet I live in the soil, and glow in a blink.

I can be baked but I'm not bread. When I'm hot, people want to get rid of me. I'm a component in chip manufacturing but I'm not silicon. When there are many of me that are small, we're insignificant. When people sit on a couch, they can become a kind of me.

If you get a call to ask if it's running, you'd better go catch it!