reek / wreak 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. 👇
reek: (verb) smell badly and offensively. (verb) be wet with sweat or blood, as of one's face. (verb) give off smoke, fumes, warm vapour, steam, etc..
wreak: NA
reek: r·IY·k
wreak: r·IY·k
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)