Here are some examples:
* "I'm doing a study on the effects of caffeine." (Here, "study" refers to a research project.)
* "The library is a great place for quiet study." (Here, "study" refers to the act of learning or reading.)
* "The architect's studio was filled with books and studies." (Here, "studies" refers to drawings or sketches.)
It can also be a verb, as in:
* "I'm studying for my exams."
So, "study" can be both a noun and a verb, depending on how it's used in a sentence.