On usually implies physical contact with a surface: 'Onthe roof of the house, on the floor, on the wall...' Over does not: 'A plane is flying over our house right now.'
Over 100m the time difference between word records is 0.91s. Between the current fastest man and fastest woman it is 1.06s.
There is no difference between the word replenish and refill.
Email is the a form of communication over the internet, Microsoft word is a computer program for word processing (writing, editing etc).
I don't see any difference.
The difference is that there is an extra word
Cannot is correct. Can not is incorrect.
There is a type of puzzle named spot the difference
devin grew six inches over the summer
-The difference between there, their, and they're is commonly confused.
Different is a describing word/adjective. Difference is a noun.
they move backwards
Difference is a subtraction word. What is the difference between 5 and 2 = 3