Tools and on-line resources

Dictionaries and Thesauruses

• Merriam-Webster On-line
  Find the meaning of a word. It won't find it if you don't spell it correctly.
  Find synonyms and antonyms too.
• YourDictionary.com

Others

• 100 MOST OFTEN MISPELLED MISSPELLED WORDS IN ENGLISH
  One of the most common mistakes is "a lot"... which a lot of you spell "alot"! Find more common mistakes.
• Homonyms
  Words, like "caret" and "carrot" that are pronounced the same, but are spelled
  differently, and that have different meanings.