Writing a comprehensive list of descriptive words would probably take an extremely lengthy amount of time. Just look at how many descriptive words were used in that first sentence: writing, comprehensive, descriptive, probably, extremely, lengthy, and so forth. When people hear the phrase "descriptive words" they tend to think of adjectives. While all adjectives are descriptive words, not all descriptive words are adjectives. Furthermore, many different types of adjectives exist.
In order to take away the potential of such a list to become extreme overwhelming, let's break them down into several shorter components of the list of descriptive words.
*There may be some confusion as to why gerunds belong with descriptive words. The answer is simple: they are often used to describe the actions of an individual. Therefore, they are descriptive words.