Owe is a verb that signifies being indebted to someone or something. It's meaning can be easily communicated through several synonyms, including indebted, owing, or obligated. Other similar words to 'owe' include owing money, being obliged, or in debt. The word 'owe' is also commonly used in financial terms, such as in the context of loans or mortgages. In these cases, other possible synonyms include being in arrears, being in default, or being overdue. Regardless of the context, these synonyms all convey the idea of being under an obligation or indebtedness, and can be used interchangeably to express the same idea.