Typically, a nursing dissertation is of the following length.
For Undergraduate nursing dissertation: 8000 to 15000 words
For master nursing dissertation: 12000 to 15000 words
For PhD nursing dissertation: 70000 to 100000 words
However, this is just the average number. The number of words required to write an impeccable nursing dissertation depends on various factors, including the research topic. Level of study and the institution etc.