3. Tool: Meta Glossary
Good for: Broadening SEO keyword lists, suggesting synonyms for use in optimized web content

A virtual repository of information, MetaGlossary is dictionary and keyword finder in one. Type in a term and it will display a comprehensive selection of related terms and synonyms for your keyword lists. What’s more, a second tier displays concise, direct explanations for terms and phrases including technical jargon and slang, extracted from around the internet.