Lists and other word resources at Spelling City website. Heteronyms are words that are spelled the same but pronounced differently. e.g., I am content with my blog content.
Leaving aside the gross incompetence of a medical staff that thinks the only way to communicate is by hearing and talking, this is a fascinating true story by Radiolab. Emile is locked in her body following a horrific traffic accident. Her boyfriend finally figures out how to communicate with her by spelling with his finger on her wrist.