Yes, hook is playable
...and is worth 10 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Hook" Definition
noun
A curved or barbed plant or animal part.
A curved or sharply bent device, usually of metal, used to catch, drag, suspend, or fasten something else.
A means of catching or ensnaring; a trap.
A point or spit of land with a sharply curved end.
verb-transitive
Baseball To pitch (a ball) with a curve.
Basketball To shoot (a ball) in a hook shot.
Slang To cause to become addicted.
Slang To steal; snatch. See Synonyms at steal.
idiom
By hook or by crook By whatever means possible, fair or unfair.
Get the hook Slang To be unceremoniously dismissed or terminated.
Hook, line, and sinker Informal Without reservation; completely: swallowed the excuse hook, line, and sinker.
Off the hook Informal Freed, as from blame or a vexatious obligation: let me off the hook with a mild reprimand.
phrasal-verb
Hook up To assemble or wire (a mechanism).
Hook up To become romantically or sexually involved with someone.
Hook up To connect a mechanism and a source of power.
Hook up To marry or get married.
Hook up To meet or associate: We agreed to hook up after class. He hooked up with the wrong crowd.
verb-intransitive
Slang To work as a prostitute.
To fasten by means of a hook or a hook and eye.
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