Yes, top is playable
...and is worth 6 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Top" Definition
noun
A garment worn on the upper half of the body, especially a sweater or knit shirt.
A person in this position.
A toy having one end tapered to a point, allowing it to be spun, as by suddenly pulling a string wound around it.
Baseball The first half of an inning.
Games The highest card or cards in a suit or hand.
verb-transitive
Sports To make (a stroke) in this way.
Sports To strike the upper part of (a ball), giving it forward spin.
To be at the head of: She topped her class.
To form, furnish with, or serve as a top.
verb-intransitive
To make a finish, an end, or a conclusion.
phrasal-verb
Top off To fill up (a container), especially when it is almost full to begin with.
Top out To cease rising: Interest rates topped out at 16 percent.
Top out To fill up (a ship, for example).
Top out To put the framework for the top story on (a building).
verb
to remove or cut the top of.
To shorten or remove the top of (a plant) .
To cover with a top or on the top provide, form, or serve as a top for.
To supply with a decorative or protective finish or final touch.
To resupply or refill to capacity .
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.