What is the name of this game?

I'm trying to look up this game online, but I don't know what it i called, please help? It is sort of like a crossword puzzle and looks like one, but it doesn't give you clues to what the words are. They give you a list of words, like 20 of 'em and you have to put the words in the puzzle based on how many letters are in the word. I don't know what this is called, but please help me figure it out? Thanks in advance!