tow truck vs wrecker

tow truck and wrecker both are nouns.

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

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

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

Other synonyms of tow truck include tow car.

tow truck (noun)	wrecker (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