nudger vs pusher

nudger and pusher both are nouns.

Word	Noun	Adjective	Verb	Adverb
nudger	Yes	No	No	No
pusher	Yes	No	No	No

As nouns, pusher is a hypernym of nudger; that is, pusher is a word with a broader meaning than nudger:

Other hypernyms of nudger include shover.

nudger (noun)	pusher (noun)
someone who nudges; someone who gives a gentle push	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