Recommended by Tsuky DarkMoon
"LOSE" and "LOOSE"
"Lose" means to fail to win or misplace. "Loose" means not tight or free. Ex.: I don't want to lose my keys. The button on my shirt is loose.
"WEATHER" and "WHETHER"
"Weather" refers to the atmospheric conditions. "Whether" is used to introduce alternatives or choices. Ex.: The weather is perfect for a picnic. I'm not sure whether to wear a jacket or not.