schema.org and an online dictionary

I'm having trouble about what to use from schema.org. I'm making a web site kinda similar to urbandictionary.com. Users are the contributors of the dictionary. Also the dictionary may include phrases like "2012 London Olympics", "MIT Dorms" etc. Whatever. So I want to add schema to the website. What should be schema-named the words/phrases and the users' descriptions?

http://schema.org/docs/full.html

Edit: layout of a sample page:

Gmail

1. Google's email service -user63
2. best email service in terms of spam prevention -user21
3. Gmail has a support of IMAP, POP3, SMTPi OAUTH, FRD, two-way secure login -userMew

Edit2: loyout of another sample page:

Batman 5

1. Upcoming movie of Batman, where Justien Bieber is going to play Joker -user43, May 2015
2. The opening was a disaster; Bieber slipped to the stairs and then was carried to a hospital -user22, December 2015
3. This movie was a disaster, a very poor quality movie -userKitten, March 2016