This is a pretty easy word game. You start with a five letter word and the next poster changes just one of the letters, in that word to make a new word. The next poster than does the same with the new word. etc;
I am editing the rules of the game here and further ahead. You can change the order of any of the letters, as long as you come up with a new word, by dropping one letter, and adding a new letter. for example first can become fires.
First word is: