Yes, taboo 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)
"Taboo" Definition
noun
A ban or an inhibition resulting from social custom or emotional aversion.
A prohibition, especially in Polynesia and other South Pacific islands, excluding something from use, approach, or mention because of its sacred and inviolable nature.
An object, a word, or an act protected by such a prohibition.
A prohibition against touching, saying, or doing something for fear of immediate harm from a supernatural force.
A prohibition imposed by social custom or as a protective measure.
adjective
Excluded or forbidden from use, approach, or mention: a taboo subject.
Forbidden to profane use or contact because of what are held to be dangerous supernatural powers.
Banned on grounds of morality or taste .
Banned as constituting a risk .
verb-transitive
To exclude from use, approach, or mention; place under taboo.
verb
To set apart as taboo especially by marking with a ritualistic symbol.
To avoid or ban as taboo.
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