caching / cashing 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. 👇
caching: NA
cashing: (verb) exchange for cash.
caching: k·AE·sh·ih·ng
cashing: k·AE·sh·ih·ng
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)