charge vs rate

charge and rate both are nouns.

Word	Noun	Adjective	Verb	Adverb
charge	Yes	No	Yes	No
rate	Yes	No	Yes	No

As nouns, rate is a hyponym of charge; that is, rate is a word with a more specific, narrower meaning than charge:

charge (noun)	rate (noun)
attention and management implying responsibility for safety	the relative speed of progress or change
an impetuous rush toward someone or something	amount of a charge or payment relative to some basis
a special assignment that is given to a person or group	a quantity or amount or measure considered as a proportion of another quantity or amount or measure
a quantity of explosive to be set off at one time	a magnitude or frequency relative to a time unit
heraldry consisting of a design or image depicted on a shield
(criminal law) a pleading describing some wrong or offense
a formal statement of a command or injunction to do something
request for payment of a debt
an assertion that someone is guilty of a fault or offence
the swift release of a store of affective force
(psychoanalysis) the libidinal energy invested in some idea or person or object
a person committed to your care
the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons
financial liabilities (such as a tax)
the price charged for some article or service

charge (verb)	rate (verb)
energize a battery by passing a current through it in the direction opposite to discharge	assign a rank or rating to
cause formation of a net electrical charge in or on	estimate the value of
saturate	be worthy of or have a certain rating
attribute responsibility to
set or ask for a certain price
file a formal charge against
impose a task upon, assign a responsibility to
blame for, make a claim of wrongdoing or misbehavior against
make an accusatory claim
instruct or command with authority
instruct (a jury) about the law, its application, and the weighing of evidence
to make a rush at or sudden attack upon, as in battle
direct into a position for use
fill or load to capacity
provide (a device) with something necessary
place a heraldic bearing on
cause to be agitated, excited, or roused
move quickly and violently
lie down on command, of hunting dogs
pay with a credit card; pay with plastic money; postpone payment by recording a purchase as a debt
enter a certain amount as a charge
demand payment
give over to another for care or safekeeping
cause to be admitted; of persons to an institution
assign a duty, responsibility or obligation to