I've known about this deficiency of mine for a long time. In fact, I mentioned it in a post once and called it a "noun-attack," and now I've learned the name of it from an episode of House. The victim had suffered a stroke that impaired the area of the brain that controlled his ability to recall nouns. The recall of names, as a special case of nouns, can also be affected.
Nominal Aphasia or anomia is the form caused by trauma like a stroke. The mild type is called dysnomia. That's what I suffer occasionally. It doesn't seem to be a problem when I write, only when I'm speaking. It causes me to adopt a kind of stop and start pattern. I begin a sentence, pause for a moment to search for the noun, then begin a new phrase with the recalled noun in place. When the noun is the subject, the pause is not even noticeable because I locate the noun before I begin speaking at all.
I've noticed that my dad has the same problem on occasion. However, he may have suffered mild strokes that produced it. I don't know if he was affected with dysnomia in his youth.