AppleScript Application - Multiple buttons don't work with one script...

Question

Okay, so I need to control just about 22 buttons to make this project work. But. I still can't get 2 to work.
Here is my script:
on clicked theButton
  -- Preferences:
          if title of theButton = "Save" then
                         set Word1 to the contents of the text field "WordDefine1" of window "Preferences"
                    display dialog "Saved the words:" & return & "-" & Word1
  --  Process of word one:
          else if title of theButton = "Say1" then
                    display dialog "I hope I see this cuz then that button works. YAY!"
          else if title of theButton = "Check1" then
                    if Word1 = contents of text field "WordInput1" of window "iSpell" then
                              say "If I can even see THIS, I am like in AppleScript heaven. BOTH buttons work!"
     end if
  end if
end clicked
So when I click the "Save" button, it displays the defined dialog. But the button "Say1" does absoulutely nothing. Same for the "Check1" button.
I'm guessing I did something wrong here...
Thanks in advance
P.S. (I'm not actually using the actions see here for the last 2 buttons:)

Answer 1

Okay, thanks so much, the buttonName script worked. This is part of what I have now:
-- Preferences:
if buttonName = "Save" then
  set Word1 to the contents of the text field "WordDefine1" of window "Preferences"
  display dialog "Saved the words:" & return & "-" & Word1
  --  Process of word one:
  else if buttonName = "Say1" then
  say Word1
The diplay dialog line at the end of the "Save" button script works, but when I do the say button, it has an AppleScript Error, saying that the variable Word1 is not defined. But the display dialog thing works. What the heck.