The phrase "a professional assassin" is correct and usable in written English.
It can be used to describe someone who is skilled and trained in carrying out assassinations as a profession.
Example: "The story revolves around a professional assassin who struggles with the moral implications of his work."
Alternatives: "a hired killer" or "a contract killer".
In the bombed-out city, he encounters international criminals and a professional assassin who is killing refugees.
The show sometimes feels like it goes about its murderous business with the faintly bored air of a professional assassin.
(Sony, Blu-ray/DVD combo $35.99, DVD $30.99, R) ACCIDENT Louis Koo as a professional assassin who specializes in staging killings to look like accidents.
Uma Thurman stars as a professional assassin known as the Bride, whose entire bridal party is mowed down by persons unknown at her wedding.
A SCENE in the 2005 action film, "Mr. and Mrs. Smith," shows Mr. Smith Brad Pittt), a professional assassin, racing home in his black Cadillac CTS-V.
Now, Hills was prepared to pay as much as £15,000 to have the job done not by an unreliable amateur, but a professional assassin.
Mona Sax is a mysterious professional assassin, living in a derelict theme park on Coney Island that she set up as her base.
It was no simple thing explaining to a retired professional assassin why I couldn't do that.
(Disney; three-disc Blu-ray/DVD combo, $44.99; two-disc Blu-ray/DVD combo, $39.99; G) ALEX CROSS Out of his Madea drag Tyler Perry plays James Patterson's Detroit police detective (and licensed psychologist), here up against a crazed professional assassin (Matthew Fox).
He's an unlikely assassin.
Like Mr. Ellis, Mr. McCullough takes pains to be fair and thorough but cannot hide his abiding respect for Adams and his impatience with Jefferson's frequent displays of hypocrisy (over everything from slavery to his sponsoring of a professional character assassin to defame the reputation of his old friend Adams).
