WRECKER
saboteur, wrecker, diversionist
(noun) someone who commits sabotage or deliberately causes wrecks
wrecker
(noun) someone who demolishes or dismantles buildings as a job
Source: WordNet® 3.1
Etymology
Noun
wrecker (plural wreckers)
A person or company that dismantles old or wrecked vehicles or other items, to reclaim useful parts. (Australia)
One who breaks up situations, events.
A tow truck.
A mooncusser.
In the Soviet Union, someone accused of the formal charge of wrecking, that is, undermining the state in intangible ways.
Synonyms
• (one who wrecks): breaker, destroyer, ruiner, vandal
Antonyms
• (one who wrecks): builder, constructor, maker, producer
Source: Wiktionary
Wreck"er, n.
1. One who causes a wreck, as by false lights, and the like.
2. One who searches fro, or works upon, the wrecks of vessels, etc.
Specifically: (a) One who visits a wreck for the purpose of plunder.
(b) One who is employed in saving property or lives from a wrecked
vessel, or in saving the vessel; as, the wreckers of Key West.
3. A vessel employed by wreckers.
Source: Webster’s Unabridged Dictionary 1913 Edition