manner / manor 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. 👇
manner: (noun) how something is done or how it happens. (noun) a way of acting or behaving. (noun) a kind.
manor: (noun) the mansion of a lord or wealthy person. (noun) the landed estate of a lord (including the house on it).
manner: m·AE·n·er
manor: m·AE·n·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)