What do you call when you re-arange letters?

Answer 1

Rearranging the letters in a word or phrase to form another word or phrase is called an "anagram." An example of an anagram would be rearranging the letters in the word "Dormitory" to get the phrase "dirty room." In making an anagram, no letters can be left out, or else the anagram will not be completed.

Answer 2

When you rearrange a word and omit some letters from the word, it is called an anagram.

Answer 3

I believe that would be an anagram.