dour / dower 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. 👇
dour: (adjective) harshly uninviting or formidable in manner or appearance; ; ; ; - J.M.Barrie.
dower: (noun) a life estate to which a wife is entitled on the death of her husband.
dour: d·AW·er
dower: d·AW·r
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)