Yes, hammer is playable
...and is worth 14 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Hammer" Definition
noun
A hand tool consisting of a handle with a head of metal or other heavy rigid material that is attached at a right angle, used for striking or pounding.
A part of an apparatus that strikes a gong or bell, as in a clock.
A small mallet used by auctioneers.
A tool or device similar in function or action to this striking tool, as:.
verb-intransitive
Informal To keep at something continuously: hammered away at the problem.
To deal repeated blows with or as if with a hammer; pummel: "Wind hammered at us violently in gusts” ( Thor Heyerdahl).
To undergo beating in the manner of a hammer: My pulse hammered.
verb-transitive
To beat into a shape with or as if with a hammer: hammered out the dents in the fender; hammered out a contract acceptable to both sides.
To hit, especially repeatedly, with or as if with a hammer; pound. See Synonyms at beat.
To inflict a heavy loss or damage on.
To put together, fasten, or seal, particularly with nails, by hammering.
idiom
Under the hammer For sale at an auction.
verb
To strike blows especially repeatedly with or as if with a hammer.
To make repeated efforts.
To reiterate an opinion or attitude.
To beat, drive, or shape with repeated blows of a hammer.
To fasten or build with a hammer.
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.