Nouns

(n)mercenary, soldier of fortunea person hired to fight for another country than their own

Adjectives

(s)mercenary, free-lance, freelanceserving for wages in a foreign army“mercenary killers”
(s)mercantile, mercenary, moneymaking, commercialprofit oriented“a commercial book”, “preached a mercantile and militant patriotism” (John Buchan), “a mercenary enterprise”, “a moneymaking business”