pushing vs nudge

pushing and nudge both are nouns.

Word	Noun	Adjective	Verb	Adverb
pushing	Yes	No	No	No
nudge	Yes	No	Yes	No

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

Other hyponyms of pushing include depression, jog, press, pressing, pressure, shove, boost.

pushing (noun)	nudge (noun)
the act of applying force in order to move something away	a slight push or shake

pushing (verb)	nudge (verb)
	push into action by pestering or annoying gently
	to push against gently