"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.

"LED" and "LEAD"

"Led" is the past tense of the verb "to lead." "Lead" can be a verb meaning to guide or a noun referring to a type of metal. Ex.: She led the team to victory. He will lead the project. The pipes are made of lead.