Yes, surprisingly is spelled with an S.
Surprisingly is how you spell it. You spelled it correctly.
Yes, you have spelled prosperous correctly.
You spelled it correctly in the question.
correctly
You have spelled both correctly in your question
Parcel is spelled correctly but sandel is incorrect. The correct spelling is sandal.
Yes it is spelled correctly
You have spelled 'still' correctly.
No word is always spelled correctly. But the word "correctly" is correctly spelled as correctly. (see related question)
Yes, you have spelled prosperous correctly.
You've spelled it correctly.
You spelled it correctly..
Convenience (easy access or availability) is correctly spelled.
Yes, engineer is spelled correctly in your question.
Correctly: How did Elise spell? She spelled correctly.
You've spelled it correctly.
You've spelled it correctly.
You spelled it correctly in the question.