It makes me green, looking at my neighbors or my best friend with this emotion

A defective car Should be yellow To a Thirty Rock star Jack would say, Good God...

I coil like a snake yet carry no bite, I bring forth water with pressure and might.

I may lead troops into the fight, or speak of things in a broader light. One gives commands, one keeps things wide, What single word can both provide?

Polo, Chariot, and Coach render me well. And I often prance around in a Carousel.