career / korea 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. 👇
career: (noun) the particular occupation for which you are trained. (noun) the general progression of your working or professional life. (verb) move headlong at high speed.
korea: (noun) an Asian peninsula (off Manchuria) separating the Yellow Sea and the Sea of Japan; the Korean name is Dae-Han-Min-Gook or Han-Gook.
career: k·er·IH·r
korea: k·ao·r·IY·ah
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)