Reply #23

ad = advertisement
add = addition

alot = is not a word!
a lot = many

noone = is not a word!
no one = nobody

affect = http://www.merriam-webster.com/dictionary/affect
effect = http://www.merriam-webster.com/dictionary/effect

insure = http://www.merriam-webster.com/dictionary/insure
ensure = http://www.merriam-webster.com/dictionary/ensure
assure = http://www.merriam-webster.com/dictionary/assure

flout = disregard
flaunt = show off

capital = a city, or wealth
capitol = a building where lawmakers meet

lay = Lay is a transitive verb meaning to put or place. Its principal parts are lay, laid.
I will lay the keys on the table. I've laid the keys on the table. Chickens lay eggs.

lie = Lie is an intransitive verb meaning to recline or rest on a surface. Its principal parts are lie, lay, lain.
When I'm tired, I lie in bed. He's lain in bed all day.

toward = NEVER put an S on the end of this word!
anyway = NEVER put an S on the end of this word!

Some others involving compound words:

I will give away 3 items in the prize giveaway.
I will use the setup utility to set up the program.