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

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n. Either of the two vertical pieces framing a doorway and supporting the lintel. Also called doorpost.

n. Either of the upright posts on either side of a door, which together support a lintel.

n. a jamb for a door

"In 1987 they finally found the narrow tomb entrance; on the doorjamb was the cartouche of Ramses II that Burton had noted in his journal."

jamb   

deadbolt    dreadful-looking    curbstone    thumper    nose    overhead    clinch    doorframe    key-operated