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

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n. Chiefly British An enlisted soldier.

n. Chiefly British A commissioned officer who has been promoted from enlisted status.

adj. comparative form of rank: more rank

n. One who ranks things, or arranges them in ranks.

n. One who ranks, or disposes in ranks; one who arranges.

n. One who ranks or arranges; one who disposes in ranks.

n. A military officer who has risen or been promoted from the ranks.

n. A man in the ranks.

n. a commissioned officer who has been promoted from enlisted status

n. an enlisted soldier who serves in the ranks of the armed forces

"He struggled to recall the ranker's name before finally coming up with it."

commissioned officer    soldier   

gentleman ranker   

anchor    anker    banker    canker    danker    hanker    rancor    shanker    tanker   

skylance    subofficer    lienholder    overcaptain    majer    macrowave    plashy    pteridon    streetwise    undercaptain