Synonyms for Mercenary:

adj.

avaricious (adjective)
miserly, monopolistic, acquisitive, rapacious, money-grubbing, selfish, venal, Cadging, usurious, avaricious, greedy, hoarding, grasping, possessive, sordid.
dishonest (adjective)
corrupt.
greedy for money (adjective)
grasping, sordid, stingy, money-grubbing, venal, miserly, avaricious, corrupt, selfish, acquisitive.

n.

self-centered, inward-looking, cynical, self-seeking, ungenerous, self-absorbed. gi, commando, grenadier, self, cannon fodder, foot soldier, green beret, crew, crooked, bombardier, corrupt, airwoman, praetorian, airman. acquisitive (noun)
stingy.
person who fights, kills for money (noun)
warrior.

Other synonyms:

corrupt, praetorian. crooked. Other relevant words:
praetorian, ungenerous, corrupt, self-seeking, stingy, crooked.

Usage examples for mercenary

  1. The army was primarily mercenary as it had been in medieval times, with officers buying their commissions. – Our Legal Heritage, 4th Ed. by S. A. Reilly
  2. " Could you possibly associate mercenary motives with any step which he might take? – At the Mercy of Tiberius by August Evans Wilson
  3. The rules of attack and of self- defence are alike unknown to him; he can neither give nor take; he is attracted by women, and stands in awe of them; his very good qualities tell against him, he is all generosity and modesty, and completely innocent of mercenary designs. – The Country Doctor by Honore de Balzac