Recommended by Guy Fater
"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.
"ELICIT" and "ILLICIT"
"Elicit" means to draw out or provoke a response. "Illicit" means illegal or forbidden. Ex.: The teacher's question elicited a lively discussion. The police uncovered an illicit gambling operation.