✅ A creek is a small stream or a narrow waterway (The children played by the creek near their house).

✅ A rivulet refers to a very small stream or brook (A tiny rivulet trickled down the hillside). 

✅ Both words describe small flowing bodies of water. 

✅ Creek is a more commonly used term for small streams, while rivulet is often used for even smaller, less significant streams (The creek was wide enough for a small boat; I was able to cross the rivulet in two steps).

✅ Safely means in a manner free from danger or harm (He drove safely through the snowstorm). 

✅ Securely means firmly or tightly fastened or protected (The box was securely locked). 

✅ Both words refer to being protected from potential harm or risk. 

✅ Safely often pertains to avoiding danger or ensuring protection, while securely focuses on physical stability or security (The safely guarded vault was never breached; The cans of food were stored securely on the shelves).

✅ Cynical refers to a distrustful attitude towards others’ motives, often believing they are selfish (She was cynical about the politician’s promises). 

✅ Skeptical means having doubts or questioning the validity of something (He was skeptical of the new scientific theory). 

✅ Both terms involve questioning or doubt.

✅ Cynical usually implies a deeper level of mistrust or disbelief in others' motives, while skeptical is a more general term for doubt (I was cynical about their seemingly friendly demeanor and kept wondering if they were hiding something; A skeptical nature tends to question everything).