The selection of letters is random, so, the number of words - solutions is also random. However the user can configure the range of the number of words - solutions, editing the ~/.config/spelion/spelion.config file. That means that the puzzle can have e.g. between 10 and 30 solutions, or between 50 and 100 etc.
The user can avoid the frustration of not ever knowing the right answers when no other solutions come to mind: with the W option the user can browse the list of all possible solutions to the puzzle.
Thank you for your feedback, any other suggestion/correction/input is most welcome.