wrecker vs tow truck

wrecker and tow truck both are nouns.

Word	Noun	Adjective	Verb	Adverb
wrecker	Yes	No	No	No
tow truck	Yes	No	No	No

As nouns, wrecker and tow truck are synonyms defined as:

wrecker and tow truck: a truck equipped to hoist and pull wrecked cars (or to remove cars from no-parking zones)

Other synonyms of wrecker include tow car.

wrecker (noun)	tow truck (noun)
a truck equipped to hoist and pull wrecked cars (or to remove cars from no-parking zones)	a truck equipped to hoist and pull wrecked cars (or to remove cars from no-parking zones)
someone who commits sabotage or deliberately causes wrecks
someone who demolishes or dismantles buildings as a job