To do word-by-word font changes, just delete anything on the Title, in case there is placeholder Text. Click with the Type Tool, and just begin Typing. When done, with the Type Tool, just Select each word, and in the Text area, choose the desired font from the drop-down.
This is a simple, two-line Text Title, where many of the fonts have been changed, after that word has been Selected:
Hope that this helps and good luck,