reduce vs gain

reduce is not a noun while gain is a noun.

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

reduce (noun)	gain (noun)
	the amount of increase in signal power or voltage or current expressed as the ratio of output to input
	the advantageous quality of being beneficial
	the amount by which the revenue of a business exceeds its cost of operating
	a quantity that is added

reduce (verb)	gain (verb)
take off weight	increase (one's body weight)
cut down on; make a reduction in	rise in rate or price
narrow or limit	increase or develop
cook until very little liquid is left	obtain advantages, such as points, etc.
to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons	reach a destination, either real or abstract
make smaller	earn on some commercial or business transaction; earn as salary or wages
reduce in size; reduce physically	win something through one's efforts
make less complex	derive a benefit from
reduce in scope while retaining essential elements	obtain
lessen the strength or flavor of a solution or mixture
be cooked until very little liquid is left
be the essential element
destress and thus weaken a sound when pronouncing it
undergo meiosis
reposition (a broken bone after surgery) back to its normal site
lower in grade or rank or force somebody into an undignified situation
lessen and make more modest
simplify the form of a mathematical equation of expression by substituting one term for another
bring to humbler or weaker state or condition
put down by force or intimidation