drug trafficker vs pusher

drug trafficker and pusher both are nouns.

Word	Noun	Adjective	Verb	Adverb
drug trafficker	Yes	No	No	No
pusher	Yes	No	No	No

As nouns, drug trafficker and pusher are synonyms defined as:

Other synonyms of drug trafficker include drug dealer, drug peddler, peddler.

drug trafficker (noun)	pusher (noun)
an unlicensed dealer in illegal drugs	a small vehicle with four wheels in which a baby or child is pushed around
	a sandal attached to the foot by a thong over the toes
	someone who pushes
	an unlicensed dealer in illegal drugs
	one who intrudes or pushes himself forward