Searching through whole website

I am sorry for this off-topic. But I just can't find any other place to put it on atm and hopefully someone knows.

I was wondering if there is a way to search through a whole website, including all the tabs on it etc, and find words with specific lengths. So if I have a website and am looking for all words with length X. Is there possible to find them in a way and have them all listed?

Thanks