A greeting or a parting gesture. You might find me in hair or in the crowd of a sports event. You can ride me for fun.

I am sometimes wooden, metallic, or even furry, but I am not too big to hold in one hand. You might fear me.

A command when at war, a livelihood's end, a warning at home, a blacksmith's true friend It rules above clouds, it seethes beneath crust A terrible foe who, in shadows, we trust

First, your brain after a test, or something easy to digest Last, found in every building, but in my case a fairy's dwelling My whole you eat with glee, but sometimes I can poisoned be In tales my ring steals you, or a girl ate me and grew

My first part shines a light on all and makes my second part bloom. I can grown very tall and brighten every garden or room.