Merriam Webster's Collegiate Dictionary
Merriam-Webster's Collegiate Dictionary, Tenth Edition, is America's most trusted reference tool. This "voice of authority" features over 214,000 definitions and 160,000 entries. To further enhance this reference tool, it also includes Merriam-Webster's Collegiate Thesaurus, with nearly 250,000 synonyms, antonyms, and idiomatic phrases, and the American Concise Encyclopedia, with more than 15,000 entries.

Merriam Webster's Rhyming Dictionary
The tool of first resort for a new generation of poets and lyricist. More than 67,000 entries. Includes one-, two-, and three- syllable rhyming words, open compounds, and brand names. Fully cross-referenced for ease of use.