Scrabble Dictionary

Check if your word is playable in Scrabble.

Yes, lifer is playable

...and is worth 9 points.

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Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)

"Lifer" Definition

noun

A prisoner serving a life sentence.
Informal Slang A right-to-lifer.
One who makes a career in one of the armed forces.
A person who has made a commitment (as to a way of life).
A person who makes a career of one of the armed forces.