"PEEK," "PIQUE," and "PEAK"

"Peek" means a quick look. "Pique" means to provoke or arouse. "Peak" refers to the highest point. Ex.: Let's take a peek at the menu. Her curiosity was piqued. We reached the mountain peak at noon.

"ENSURE" and "INSURE"

"Ensure" means to guarantee or make certain. "Insure" refers to obtaining insurance coverage. Ex.: Please ensure the door is locked. We need to insure our new car.