troop / troupe 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. 👇
troop: (noun) a group of soldiers. (noun) a cavalry unit corresponding to an infantry company. (noun) a unit of Girl or Boy Scouts. (noun) an orderly crowd. (verb) move or march as if in a crowd.
troupe: NA
troop: t·r·UW·p
troupe: t·r·UW·p
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)