Abstract and concrete words can be any form of a word; the word can be an adjective, verb, noun, etc. The difference in the words is not only the spelling, but also what they mean. All words fall under the category of abstract or concrete.

     Abstract words are words that cannot be visualized mentally. A word such as "thinking": everyone knows what it is, but you can’t see it. Abstract words can be nouns, but with these kinds of nouns a person cannot have this thing in front of him and be able to reach out and touch it.

     Concrete words are a bit different than abstract words. Concrete words can be visualized. A person may have a stereotype of what this looks like that he or she can mentally visualize. A word such as "chair" is a concrete word. If a chair was sitting in front of you, you could reach out and touch it, or a person may have a stereotype of a chair in his or her head. They may think "chair" and mentally visualize a wooden thing with four legs with an upright back that you sit on; then again they may think of a Lazyboy Recliner as a good stereotype.

     The main difference in these words is whether it is something that you mentally visualize or reach out and touch it or if it is something that can’t be seen, touched, tasted, etc. The only thing that these two words really have in common is that they are both words.