What's a Managra?
It's pronounced MAN-AH-GRA (sounding almost like the city, Managua, the capital of Nicaragua).
You know what an anagram is, of course. An anagram is a word or phrase that can be rearranged, using each letter, only once, into another word or phrase.
For example, the word "god" can be rearranged to be the word "dog". Dog is an Anagram of god. (It's also a reversal. Reversing a word to make another word is a valid form of anagram.)
The word "spot" can be rearranged to the words "tops", or "stop", or even "pots". Each of these words can be said to be an anagram of any of the others.
A MANAGRA is simply a word that has no anagrams!
The word "Goo" has no anagrams. The letter-strings "ogo" and "oog" are not recognizable words in a dictionary. Goo is a Managra because it has no anagrams.
The term is my own invention, because I was unable to find another word in the English language for a word with this property. We name every single part of speech, we have absurd descriptions of numbers like "happy primes", we have words for the little plastic thing on your shoelaces (an aglet), and the little dot over a lowercase i (that's called a tittle).
We go to absurd efforts to learn cursive and learn to diagram sentences, but we don't have a simple word for what's effectively the lingual equivalent of a prime number.
Its cousin: the Mangara
There's one other term I've come up with, a MANGARA (Pronounced Man-GAR-UH).
A MANGARA is a word that has exactly one anagram.
Taking the example above, god and dog are mangaras. The other combinations of letters (ogd, odg, gdo, dgo) aren't valid words. (Yes, one could argue that some of those are abbreviations, like GDO for "Garage Door Opener". Obviously, what the user defines as a word is up to them.)
Future Uses
I'd love to see software developed (in whatever language suits your fancy) to find how many words are in fact, managras or mangaras or multi-anagrams. Obviously, every word in a given list falls into exactly one of these categories (that is, a word can have zero, one, or many anagrams), and as language evolves, a word's state can change as more valid words are defined.
Who am I?
I'm Dan Mahoney (often known in nerdy circles as Gushi). When I'm not tampering with the English Language, I help make the internet function for a non-profit you haven't heard of unless you're a big nerd. You can contact me about this at managra -at- gushi -dot- org
Of note:
"All words are made up." --Thor, Avengers: Infnity War