Is there a word for a certain kind of noun?

So, in English we have a lot of words that can be both nouns and verbs. Like "dream"--you can say "I have a dream" (noun) or "I dream of Jeannie" (verb). I was wondering if there's a special term for this kind of word when it acts as a noun, especially when it's a word that you see more often as a verb, like "clash".

The reason I ask is that I've started rereading "A Song of Ice and Fire," and was struck by how formulaic the titles are: "A Game of Thrones," "A Clash of Kings," "A Storm of Swords," "A Feast for Crows," "A Dance with Dragons," "The Winds of Winter," and "A Dream of Spring." I was thinking about making a shirt that said "A Verb of Nouns," but then I realized that wasn't actually correct. Is there a better way to phrase that? Plus, I think more specific terms would make it funnier.