"DISCREET" and "DISCRETE"

"Discreet" means careful or unobtrusive. "Discrete" means separate or distinct. Ex.: She was discreet about her personal life. The project was divided into discrete tasks.

"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.