The difference between Greenie and Tyro

When used as nouns, greenie means an environmentalist, whereas tyro means a beginner.

check bellow for the other definitions of Greenie and Tyro

Greenie as a noun (chiefly, Australia, New Zealand, slang, often, derogatory):

An environmentalist; someone who shows concern for the environment.
Greenie as a noun (Australia, by extension):

A member of the Green Party.
Greenie as a noun (US, Wyoming, derogatory, slang):

A person from Colorado; after the color of the Colorado license plate.
Greenie as a noun:

An unripe fruit.
Greenie as a noun (US, slang):

A beginner, a novice.
Greenie as a noun (US, slang):

A small, green object or creature. A tablet of amphetamine.