geografio

A word to take apart privately and never to imitate. Geo- really means earth and -grafio really means writing or describing, and knowing that makes geografio, geologio, fotografio and biografio easier to hold in the head. What you must not do is treat those pieces as Esperanto affixes and coin new ones.

They are not on anybody's official list. -Ologio, -fobio, -metro, -grafio are international formants that European languages inherited from Greek, and Esperanto borrowed the finished words rather than the machinery. The apposition and affix-like roots article puts the rule plainly: you may take these apart to remember them, you may not build new ones on the pattern and expect to be understood. Geografio arrived whole; so did biologio.

The family is regular once it is here. Geografia is geographical, geografo a geographer, geografie geographically. Note that the -io closing this word is part of the borrowing, not the -io that names countries in Francio and Italio - the same two letters doing two unrelated jobs, which is normal in a language that takes its vocabulary from everywhere.