"ADVICE" and "ADVISE"

"Advice" is a noun. "Advise" is a verb. Ex.: His advice was invaluable. Can you advise me on this issue?

"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.