Searched words:
drupal input format module prevent orphaned words
drupal input format module stop word on line
drupal input format do not leave word on single line
drupal input filter orphan word
drupal input filter   word
drupal filter module non-breaking space word
drupal input format module nbsp
automatically avoid sole word on a line
It would work as an input filter, and put in a non-breaking space between the last two words of every paragraph, so that one word would never be on the last line by itself.
Not entirely sold on the idea, aesthetically, but i'm surprised there's no module for that yet...
