✅ Extremely means to a very high degree, beyond the usual or expected (The weather was extremely hot this summer).

✅ Immoderately refers to something that is done with a lack of restraint or self-control, often excessively (We ate immoderately at the buffet, piling our plates with food).

✅ Both words describe something done in excess or beyond the norm.

✅ Extremely is a more common term for describing intensity, while immoderately implies lack of control or excess (The extremely fast runner broke the record; Over the holidays, I ate immoderately which gave me a stomachache).

✅ Polite means showing good manners and respect for others (She gave a polite smile to the stranger).

✅ Courteous refers to being especially considerate and respectful in one's behavior (The waiter was very courteous and attentive).

✅ Both words describe behavior that is respectful and well-mannered.

✅ Polite can be used in everyday social situations, while courteous often carries a more formal tone, suggesting a higher level of attentiveness (Their new neighbor was polite at the dinner party; The hotel staff was courteous to all their guests).

✅ Indecision refers to the inability to make a decision or commit to a course of action (Her indecision about where to go for dinner was frustrating).

✅ Vacillation refers to wavering between different options or opinions (His vacillation between job offers made him miss both opportunities).

✅ Both words describe hesitation in making a decision.

✅ Indecision is more about being stuck in uncertainty, while vacillation suggests constantly going back and forth between choices (His indecision cost him the last available concert ticket; My vacillation annoyed everyone waiting for an answer).