Merriam-Webster

Designed for students grades 9-11, ages 14 and up, this newly update thesaurus offers more than 154,000 word choices.

Features more than 245,000 synonyms. Provides brief definitions for each word.

Merriam-Webster's Collegiate Dictionary, Eleventh Edition, is a newly revised and updated reference book that defines the current, active vocabulary of American English. With over 225,000 definitions.

A bilingual, bidirectional guide to North American English. More than 80,000 entries and 100,000 translations.