overseas / oversees 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. 👇
overseas: (adverb) in a place across an ocean.
oversees: (verb) watch and direct.
overseas: OW·v·er·s·IY·z
oversees: OW·v·er·s·IY·z
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)