The English words lightening and lightning are only one letter apart in spelling and pronunciation, but worlds apart in meaning. The lightning bolt of comprehension you get after reading this lesson will start lightening your confusion.
The words loose and lose are mixed up in writing; for some reason, many people write loose when they really mean lose. But there's no reason to lose your mind worrying about this, just lose the extra o!
Though it's no longer official, over is widely considered incorrect when used in front of a number; the correct term is more than. You'll have learned more than you need to know once you've read over this lesson.
The words stationary and stationery are often confused by English speakers due to their similar spelling and pronunciation. If you remain stationary in front of your computer, you can copy this lesson onto your own stationery.