This is actually one of the more ridiculous things I’ve ever seen, but I figured since I had to learn it, you should too.
Kangaroo words are words that contain smaller synonyms of themselves. They’re called kangaroo words because kangaroos carry their joeys in their pouches and kangaroo words do essentially the same thing.
For example: alone which has the words lone and one in it. Or precipitation, from which you can get the word rain. Or revolution, from which you get revolt.*
And then there are anti-kangaroo words, words that contain an antonym of themselves. Like covert/overt and animosity/amity.
Apparently there’s a need to define such words. I like language as much as the next person, but this seems a bit of overkill. In my head, at one time there was a 90-year-old Cambridge** linguistics professor sitting alone in his office trying to entertain himself who made a weird game out of it for word nerds.***
Anyway, if you’re interested *cough* mom *cough*, you can find a bunch of kangaroo words here.
*Okay, that one I like.
**Or Oxford, take your pick, but I have a number of friends who are Oxford grads and none of them are the type to ever do this.
***Not that I’m not a word nerd (see the post on ignivomous), but this is a whole new level of nerdiness.