This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Pulled or drawn tight; not slack. See Synonyms at tight.

adj. Strained; tense: nerves taut with anxiety.

adj. Kept in trim shape; neat and tidy.

adj. Marked by the efficient, sparing, or concise use of something, such as language or detail: a taut movie script.

adj. Tight; under tension, as in a rope or bow string.

adj. Experiencing stress or anxiety.

adj. Containing only relevant parts, brief and controlled.

adj. Tight; stretched; not slack; -- said esp. of a rope that is tightly strained.

adj. Snug; close; firm; secure.

Tight; tense; not slack: as, a taut line.

Hence In good shape or condition; properly ordered; prepared against emergency; tidy; neat.

adj. subjected to great tension; stretched tight

adj. pulled or drawn tight

"Kira's face appeared again, her expression taut with an agonized fury."

tense   

to heave taut   

tautness    tautly    tauten   

tight    stretched    snug    close    firm    secure    tigh   

Lot    Mayotte    Wat    begot    bought    brought    caught    distraught    fought    fraught   

tight    tense    rigid    supple    muscular    shapely    breathless    elastic    silky    shiny