pusher vs push

pusher and push both are nouns.

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

pusher (noun)	push (noun)
a small vehicle with four wheels in which a baby or child is pushed around	the act of applying force in order to move something away
a sandal attached to the foot by a thong over the toes	an effort to advance
someone who pushes	an electrical switch operated by pressing
an unlicensed dealer in illegal drugs	enterprising or ambitious drive
one who intrudes or pushes himself forward	the force used in pushing

pusher (verb)	push (verb)
	make publicity for; try to sell (a product)
	press, drive, or impel (someone) to action or completion of an action
	make strenuous pushing movements during birth to expel the baby
	move with force
	approach a certain age or speed
	press against forcefully without moving
	move strenuously and with effort
	sell or promote the sale of (illegal goods such as drugs)
	strive and make an effort to reach a goal
	exert oneself continuously, vigorously, or obtrusively to gain an end or engage in a crusade for a certain cause or person; be an advocate for