loop / loupe are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
loop: (noun) anything with a round or oval shape (formed by a curve that is closed and does not intersect itself). (noun) an inner circle of advisors (especially under President Reagan). (noun) the basic pattern of the human fingerprint. (noun) a computer program that performs a series of instructions repeatedly until some specified condition is satisfied. (noun) an intrauterine device in the shape of a loop. (noun) a flight maneuver; aircraft flies a complete circle in the vertical plane. (verb) move in loops. (verb) make a loop in. (verb) fly loops, perform a loop. (verb) fasten or join with a loop.
loupe: (noun) small magnifying glass (usually set in an eyepiece) used by jewelers and horologists.
loop: l·UW·p
loupe: l·UW·p
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)