Word/Play explains the difference between ~tion, ~sion, and ~cian. All are pronounced 'shun' but are used differently. These three take (usually) verbs and make them nouns.
First, the most common is ~tion. When in doubt, spell the word with ~tion.
addition
revolution
action
Second, if the verb ends with -d, -de, -se, or -t spell the word with an ~sion.
collision (from collide)
persuasion (from the verb persuade)
explosion (from the verb explode)
Musician
Politician
Pediatrician
After Word/Play, we have an Interview with a Hokuriku University student. She talks about her future and teaches us two words: finance and graduate school in Japanese, English, and Chinese.
Finally, we have our Music:
MoshiMo by Kimux from GBUC.net
Holiday by Hard Queen from Last.fm
See you next week!
Finally, if you're talking about people and jobs, spell the word with a ~cian.