reduce vs change

reduce is not a noun while change is a noun.

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

As verbs, change is a hypernym of reduce; that is, change is a word with a broader meaning than reduce:

reduce: 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
change: undergo a change; become different in essence; losing one's or its original nature

reduce (noun)	change (noun)
	the action of changing something
	a different or fresh set of clothes
	a thing that is different
	a difference that is usually pleasant
	an event that occurs when something passes from one state or phase to another
	the result of alteration or modification
	coins of small denomination regarded collectively
	the balance of money received when the amount you tender is greater than the amount due
	money received in return for its equivalent in a larger denomination or a different currency
	a relational difference between states; especially between states before and after some event

reduce (verb)	change (verb)
take off weight	undergo a change; become different in essence; losing one's or its original nature
cut down on; make a reduction in	cause to change; make different; cause a transformation
narrow or limit	become different in some particular way, without permanently losing one's or its former characteristics or essence
cook until very little liquid is left	change clothes; put on different clothes
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	exchange or replace with another, usually of the same kind or category
make smaller	lay aside, abandon, or leave for another
reduce in size; reduce physically	remove or replace the coverings of
make less complex	become deeper in tone
reduce in scope while retaining essential elements	change from one vehicle or transportation line to another
lessen the strength or flavor of a solution or mixture	give to, and receive from, one another
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