The avocado is an oily, green fruit. A cactus is a prickly plant that lives in dry places. Celery is a crisp, green vegetable. A chrysalis is the stage in a butterfly's life when it is changing from a a caterpillar into a butterfly. It is also called the pupa.
Some chrysalis are green.
An emerald is a hard, shiny, green jewel. An evergreen tree doesn't lose its leaves in the winter. A fern is a lacy, primitive plant. Some frogs are green. A gown is a fancy dress.