If you mean dilemma as in 'a problem with no acceptable solutions' then yes, you are spelling it correctly.
No, the correct spelling is dilemma (a difficult situation).
You have spelled 'still' correctly.
Yes, "negotiable" is spelled 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've spelled it correctly.
You've spelled it correctly.