beach / beech 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. 👇
beach: (noun) an area of sand sloping down to the water of a sea or lake. (verb) land on a beach.
beech: (noun) any of several large deciduous trees with rounded spreading crowns and smooth grey bark and small sweet edible triangular nuts enclosed in burs; north temperate regions. (noun) wood of any of various beech trees; used for flooring and containers and plywood and tool handles.
beach: b·IY·ch
beech: b·IY·ch
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)