Anagrams

An anagram is a type of word play, the result of rearranging the letters of a word or phrase to 
produce a new word or phrase, using all the original letters exactly once.
For example, the word anagram can be rearranged into nag-a-ram. Someone who creates anagrams may
be called an "anagrammatist". 
    
The original word or phrase is known as the subject.
Anagrams Subject
martian, tamarin They are all from the letters - a,a,i,m,n,r,t
opts, post, pots, spot, stop, tops They are all from the letters - o,p,s,t
assentor, senators, starnose, treasons They are all from the letters - a,e,n,o,r,s,s,t