Features free vocabulary building exercises from David Fisco.

Collection of obscure and rarely used English words.

Alternative dictionary presents the not-so-known meanings of some words.

Free online dictionary of peculiar and weird meaning words. With links to dictionary websites of the similar theme.

Compiles word lists on a variety of topics along with a host of language resources.

Study Room makes it easy to build Vocabulary for SAT, GRE and ACT words. Contains videos, word list and mobile apps.

Build a better vocabulary in order to prepare for SAT tests or to develop better English skills.

Resource for a variety of dictionaries and vocabulary resources. With links to books, libraries, and word games.

Offers a method to expand vocabulary using digital flashcards. Includes FAQ and free registration.