✅ Extremely means to a very great degree (She was extremely happy with her test results). 

✅ Inordinately suggests an excessive or unusually high degree (The speech was inordinately long, making the audience restless). 

✅ Both words describe an intense level or degree of something. 

✅ Extremely is commonly used in a wide range of contexts to emphasize high degrees, while inordinately implies an excessiveness that is beyond normal limits (The weather was extremely cold, with temperatures dropping below freezing; The cake was inordinately sweet, making it difficult to finish even a small slice).

✅ Inform means to give someone facts or information (Please inform the team about the changes). 

✅ Enlighten refers to giving someone greater knowledge or understanding about a subject (The lecture enlightened the audience about the new technology). 

✅ Both words involve providing information, understanding, or knowledge of something.

✅ Inform is used for supplying basic or essential information, while enlighten suggests a deeper, more comprehensive understanding (She informed me of the meeting time; He enlightened us about the significance of prehistoric art).

✅ A messenger refers to a person who carries a message or communication (The messenger delivered the note quickly). 

✅ A courier is a person or service that transports messages, packages, or mail, often rapidly and securely (The courier service guaranteed next-day delivery). 

✅ Both words describe someone who delivers messages or goods. 

✅ Messenger is often used for simple message delivery, while courier implies a more professional or official service, often for transporting items securely (The king's messenger brought news from the battlefield; The courier delivered the documents safely).