higher / hire 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. 👇
higher: (adjective) advanced in complexity or elaboration. (adjective) of education beyond the secondary level.
hire: (noun) a newly hired employee. (noun) the act of hiring something or someone. (verb) engage or hire for work.
higher: hh·AY·er
hire: hh·AY·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)