If a gerund is a noun formed from a verb, what is a verb formed from a noun?
It seems that there is not a noun to stand for a verb derived from a noun, (like gerund is a noun to stand for a noun derived from a verb). Â There are only adjectives. Â This may be because there is still some controversy surrounding the propriety of doing this. Â Even though it is very common, if it becomes generally accepted it can lead to some really weird words.
Back to your question.  Of all the descriptions of turning a noun into a verb, I prefer  a verbified noun.  Even though I just discovered that my spell check does not accept that word.  A good, brief discussion of this is at this link: Â
http://answers.yahoo.com/question/index?qid=20080419190637AAbOYh8 Â
I don"t know of any one-word term for these verbs. I would call them denominal verbs. There are different terms used depending on the perspective. I would call the process verbalizing a noun. (Yes, I know this can mean something else as well. No matter.)
If I want to annoy curmudgeons, I call it verbing a noun, and a verbed noun.