gain vs capitalize

gain is a noun but capitalize is not a noun.

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

As verbs, capitalize is a hyponym of gain; that is, capitalize is a word with a more specific, narrower meaning than gain:

Other hyponyms of gain include cash in on, profiteer, capitalise, take advantage, pyramid, clear, net, sack, sack up.

gain (noun)	capitalize (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

gain (verb)	capitalize (verb)
increase (one's body weight)	convert (a company's reserve funds) into capital
rise in rate or price	consider expenditures as capital assets rather than expenses
increase or develop	compute the present value of a business or an income
obtain advantages, such as points, etc.	write in capital letters
reach a destination, either real or abstract	draw advantages from
earn on some commercial or business transaction; earn as salary or wages	supply with capital, as of a business by using a combination of capital used by investors and debt capital provided by lenders
win something through one's efforts
derive a benefit from
obtain