"COMPLEMENT" and "COMPLIMENT"
"Complement" means to complete or enhance. "Compliment" means to praise or express admiration. Ex.: The sauce complements the dish perfectly. She complimented him on his presentation.
"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.