breach / breech 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. 👇
breach: (noun) a failure to perform some promised act or obligation. (noun) an opening (especially a gap in a dike or fortification).
breech: (noun) opening in the rear of the barrel of a gun where bullets can be loaded.
breach: b·r·IY·ch
breech: b·r·IY·ch
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)