Yes, "negotiable" is spelled correctly.
Flattest is spelled correctly. The others are spelled: silliest, biggest and sweetest.
I believe that you spelled it right. :)
You have spelled it right already.
Only accommodate is spelled correctly. The correct spellings of the others are tyrannize, dilettante, and corroborate.
Yes, "negotiable" is spelled correctly.
You have spelled 'still' correctly.
Yes, engineer is spelled correctly in your question.
Yes, surprisingly is spelled with an S. Surprisingly is how you spell it. You spelled it correctly.
You've spelled it correctly.
Convenience (easy access or availability) is correctly spelled.
Correctly: How did Elise spell? She spelled correctly.
it is correctly spelled iPod.
It's kindergartner, not kindergartener.
You spelled it correctly: pumpkin.
You've spelled it correctly.
You've spelled it correctly.