pusher vs nudger

pusher and nudger both are nouns.

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

As nouns, nudger is a hyponym of pusher; that is, nudger is a word with a more specific, narrower meaning than pusher:

pusher (noun)	nudger (noun)
a small vehicle with four wheels in which a baby or child is pushed around	someone who nudges; someone who gives a gentle push
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