Nature and Plants:
* as green as grass: The most common and straightforward comparison.
* as green as emerald: A more vibrant and precious shade of green.
* as green as a shamrock: Symbolic of Ireland and luck.
* as green as a lime: A bright, acidic green.
* as green as a willow: Evoking a soft, gentle, and graceful shade of green.
* as green as moss: A deep, velvety green often found in damp environments.
* as green as the jungle: Evoking a lush, dense, and wild green.
Other Comparisons:
* as green as money: Referring to the color of US dollar bills, symbolizing wealth.
* as green as envy: Expressing jealousy and resentment.
* as green as a rookie: Describing someone who is inexperienced or naive.
* as green as the hills: Implying a vibrant and healthy appearance.
* as green as a cucumber: A cool, refreshing green, often used to describe someone's complexion.
* as green as the sea: A deep, oceanic green, often implying a sense of vastness and mystery.
Remember, the best answer will depend on the specific context and what you are trying to convey.