courier / currier 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. 👇
courier: NA
currier: (noun) United States lithographer who (with his partner James Ives) produced thousands of prints signed `Currier & Ives' (1813-1888). (noun) a craftsman who curries leather for use.
courier: k·ER·iy·er
currier: k·ER·iy·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)