Yes, melt is playable
...and is worth 8 points.
Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Melt" Definition
noun
A melted solid; a fused mass.
A usually open sandwich topped with melted cheese: a tuna melt.
The act or operation of melting.
The quantity melted at a single operation or in one period.
The state of being melted.
verb-intransitive
Obsolete To be overcome or crushed, as by grief, dismay, or fear.
To be changed from a solid to a liquid state especially by the application of heat.
To disappear or vanish gradually as if by dissolving: The crowd melted away after the rally.
To dissolve: Sugar melts in water.
To pass or merge imperceptibly into something else: Sea melted into sky along the horizon.
verb-transitive
To cause (units) to blend: "Here individuals of all races are melted into a new race of men” ( Michel Guillaume Jean de Crèvecoeur).
To cause to disappear gradually; disperse.
To change (a solid) to a liquid state especially by the application of heat.
To dissolve: The tide melted our sand castle away.
verb
To become altered from a solid to a liquid state usually by heat.
To disappear as if by dissolving .
To become subdued or crushed (as by sorrow).
To become mild, tender, or gentle.
To lose outline or distinctness .
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