spear / speer 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. 👇
spear: (noun) a long pointed rod used as a tool or weapon. (noun) an implement with a shaft and barbed point used for catching fish. (verb) pierce with a spear. (verb) thrust up like a spear.
speer: (noun) German Nazi architect who worked for Hitler (1905-1981).
spear: s·p·IH·r
speer: s·p·IH·r
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)