Runaway
Part of speech: adjective
Definition: out of control who has run away
Part of speech: noun
Definition: An object or process that is out of control. A child (minor) who has run away from home.
Example sentence: All the information you could want is constantly streaming at you like a runaway truck - books, newspaper stories, Web sites, apps, how-to videos, this article you're reading, even entire magazines devoted to single subjects like charcuterie or wedding cakes or pickles.
Uncontrolled
Part of speech: adjective
Definition: not controlled