Evernote Premium should include a grown up Word Processor. There is no shortage of good cross platform ones.
You need Find & Change +1
Additional functionality:
- License Grammarian or another grammar checker
- License Text Soap or another tool for stripping text
- Hook up an API for letting BBEdit, LaTex, Nisus Writer, Word, Google Docs all be used as the front end text engine
- Add more font support