Yes, verb is playable
...and is worth 11 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Verb" Definition
noun
A phrase or other construction used as a verb.
Any of the words belonging to this part of speech, as be, run, or conceive.
The part of speech that expresses existence, action, or occurrence in most languages.
A word that characteristically is the grammatical center of a predicate and expresses an act, occurrence, or mode of being, that in various languages is inflected for agreement with the subject, for tense, for voice, for mood, or for aspect, and that typically has rather full descriptive meaning and characterizing quality but is sometimes nearly devoid of these especially when used as an auxiliary or linking verb.
A word used to describe an action, state, or occurrence, and forming the main part of the predicate of a sentence, such as hear, become, happen.
verb
Use (a word that is not conventionally used as a verb, typically a noun) as a verb:.
We love the game of Scrabble®, which is why we created Free Scrabble Dictionary - a simple lookup tool to check if the word you want to play is valid in the game of Scrabble®. At the top of every page, you can enter your word and click "Search Dictionary." We'll let you know whether your word is playable and provide a few definitions as well.