Do any of these confuse you? I hope this list will help.
DEMURE—shy, reserved, modest: The young woman’s dress and demure behavior led one to think she might be a Quaker or Amish. (pronounced duhMYOOR)
DEMUR—the action of showing reluctance or doubts, hesitating or objecting: Francine thought she might accept her boss’ offer, but something about his attitude caused her to demur. (pronounced duhMUR)
PORE (v.)—to read or study carefully, to be absorbed in an activity: Benjamin, an avid golfer, pored over every golf magazine and article he could find.
POUR—what you do with a liquid and/or your feelings: Stephen poured a full glass of Burgundy and then poured out his feelings to his girlfriend.
PEAK—the pointed summit of a mountain; the point of highest activity; the pointed part of a shape, such as the peaks in beaten egg whites: In the baking competition at the top of Pike’s Peak, Sandra found herself in a peak of frenzy while beating 10 egg whites into stiff peaks for her famous French macarons.
PEEK—to look quickly or sneakily: Sandra’s competitors sneaked peeks at her while she whipped those egg whites.
PIQUE—to stimulate curiosity or interest: Sandra’s baking expertise piqued intense interest in all her competitors.
AISLE—a passageway between rows of seats or between shelves in supermarkets or other stores; what the wedding party walks down: A store the size of Costco contains dozens of aisles for food and dry goods. (Has anyone gotten married in an aisle at Costco? Probably.)
ISLE—an island. Robinson Crusoe lived on an isle; England, Scotland, Wales and Ireland are called the British Isles.
Remember, all these are words; your spellchecker won’t know if you’ve used the wrong one by accident. It’s up to you to proofread carefully.