* Direct Object: The thirsty hiker drank the water from his canteen.
* Subject: Water is essential for life.
* Object of a Preposition: The boat floated on the water.
* Appositive: A precious resource, water, is becoming increasingly scarce in some regions.
* Part of a Compound Noun: The water tower stood tall on the hill.
Let me know if you'd like to see more examples or have a specific type of sentence in mind!