* Dictionaries vary in organization: Some dictionaries use alphabetical order, some use specific themes or categories.
* Page length is inconsistent: Even in alphabetical dictionaries, the number of entries per page can change.
To figure out the last guide word, you'd need to know:
* The dictionary itself: Is it a general dictionary, a specialized dictionary, or a children's dictionary?
* The specific page: Is there any other information on the page that might give a clue?
Let me know if you have any other details about the page or the dictionary, and I might be able to help!