I am currently interested in doing some research performing various measurements and algorithms on the most common words in the English language. I have found a few good word lists online that would be suitable, but I am concerned that they may be subject to copyright and would like to be sure about their status before I use them. The lists are in the form of a simple text file with one word per line.
I understand that collections of words such as dictionaries are subject to copyright because they contain a large amount of words and their definitions which can be considered to require original work and creativity, but what about just words without any definitions or additional information?
I have seen this other Law Stack Exchange question, which mentions lists of words, but the author seems to have been interested in also using some short definitions, and I am not certain the answer refers to plain word lists.
Is a list of common words copyrightable? If so, would it still be considered fair use to use the word list to generate data not related to the words themselves?