sort letters in a single word - use it to find permutations (or anagrams)

I have some dictionary to myspell in file.dic. Let's say: abc aword bword cab worda wordzzz and I'm looking for different words that are **permutations (or anagrams)** of each other. If there was a command "letter-sort" I'd do it more or less like that: cat file.dic | letter-sort | paste - file.dic | sort That gives me: abc abc abc cab adorw aword adorw worda bdorw bword dorwzzz wordzzz so now I clearly see anagrams in file. Is there such letters-sort command or how to obtain such result in maybe some other way?