Is it normal to habitually forget words?
I think most of my friends would back me up in saying I'm an intelligent person with good verbal skills, yet I have a horrible tendency to habitually forget words. I'm only 19 and I don't abuse substances, so I don't understand how it is that I incessantly lose track of common words. I know the word I'm looking for, and I can list every synonym for it, but the word I'm looking for won't surface.
For example, yesterday I couldn't find the word "camouflage" and it was bugging me all day.
Am I crazy? Or do other people have this problem?