Recommended by Ragnar
"ALTOGETHER" and "ALL TOGETHER"
"Altogether" means completely or in total. "All together" means everyone or everything in a group. Ex.: The project was altogether successful. We sang the song all together.
"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.