The words duct and gland are often used interchangeably, but they have distinct meanings. A duct is a tube or channel that carries fluids, while glands are organs that secrete or excrete. Synonyms for duct gland include exocrine gland, which secretes substances through a duct, and endocrine gland, which secretes hormones directly into the bloodstream. Other synonyms that can be used for duct gland include sweat gland, sebaceous gland, mammary gland, salivary gland, and tear gland. Each gland serves a specific function in the body, and understanding the differences between them is crucial for properly diagnosing and treating various medical conditions.