Scrabble Dictionary

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Yes, alienate is playable

...and is worth 10 points.

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"Alienate" Definition

verb-transitive

Law To transfer (property or a right) to the ownership of another, especially by an act of the owner rather than by inheritance.
To cause to be transferred; turn away: "He succeeded . . . in alienating the affections of my only ward” ( Oscar Wilde).
To cause to become unfriendly or hostile; estrange: alienate a friend; alienate potential supporters by taking extreme positions. See Synonyms at estrange.
To cause to become withdrawn or unresponsive; isolate or dissociate emotionally: The numbing labor tended to alienate workers.

verb

To make unfriendly, hostile, or indifferent especially where attachment formerly existed.
To convey or transfer (as property or a right) usually by a specific act rather than the due course of law.
To cause to be withdrawn or diverted.