gainer vs gain

gainer and gain both are nouns.

Word	Noun	Adjective	Verb	Adverb
gainer	Yes	No	No	No
gain	Yes	No	Yes	No

gainer (noun)	gain (noun)
a dive in which the diver throws the feet forward to complete a full backward somersault and enters the water feet first and facing away from the diving board	the amount of increase in signal power or voltage or current expressed as the ratio of output to input
a person who gains (gains an advantage or gains profits)	the advantageous quality of being beneficial
a person who gains weight	the amount by which the revenue of a business exceeds its cost of operating
	a quantity that is added

gainer (verb)	gain (verb)
	increase (one's body weight)
	rise in rate or price
	increase or develop
	obtain advantages, such as points, etc.
	reach a destination, either real or abstract
	earn on some commercial or business transaction; earn as salary or wages
	win something through one's efforts
	derive a benefit from
	obtain