spell check, dictionaries, common sense (saying the word slowly aloud)
spell check.
That is the correct spelling of "tomato."
The spelling raccoon is correct and normally used. The spelling racoon is a rare variant.
No, humongus is not the correct spelling. The correct spelling is humongous.
The one you used is correct.
That is the correct spelling of "preventative" (used to deter or avoid).
The correct spelling is exhausted (worn out, or used up).
If you mean the 'bat' used to play tennis - the correct spelling is raquet
The correct spelling is "polystyrene." It is a synthetic polymer commonly used in the production of various plastic products.
sphygmomanometer
The correct spelling in British English (used in England, Canada, Australia, New Zealand and so on) is cosy.The correct spelling in American is cozy.
The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.The correct spelling is privileges.
You have used the correct spelling. It is 'embarrassment'.