oh / owe 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. 👇
oh: NA
owe: (verb) be obliged to pay or repay. (verb) be indebted to, in an abstract or intellectual sense. (verb) be in debt.
oh: OW
owe: OW
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)