Words at Play
This page focuses on Words at Play as tools for teaching vocabulary. Other resources are available on the Spelling and Vocabulary page and the Etymology page.
An antagonym is a single word that has meanings that contradict each other. They are also called contronyms.
Internet Anagram Server
This is the definitive Anagram Site: defines and helps construct anagrams. It also contains a Hall of Fame of anagrams.
It's Oxymora, Idiotsavants, not Oxymorons
From ancient Pompeii to Donald Trump, including jewels like, "I'm not going to say, 'I told you so.'"
Pleonasms or Tautological Redundancies
This page has an extensive list of common redundancies, such as "ACT test," "collaborate together," and "safe haven." It also has examples of their use, as in Yogi Berra's famous, "It's deja vu all over again."
Richard Lederer's Verbivore
"Welcome to the web site woven for wordaholics, logolepts, and verbivores."
Useful for elementary and middle school, very kid-friendly. Part of the Merriam-Webster site. Be sure to click on the "educators" button.