Moxie 2 is a free online word game with 64 letters to place and replace to make words. You start by placing letters anywhere, and hope subsequent letters turn up that will fill in and become a word. When that happens, use new letters to transform the word, one letter at a time.

There's no time limit, and you can play versions that give you more points for making specific "Moxie words" -- there are lists.

As always, what I think are words and what Moxie does differs; Hooty, zooty and footy work, tooty and cooty don't; baa, hore, vint, hun and tung are okay, mung and lan are not.

You can get more info and some tips from its reviewer and commenters at Jay is Games.