charge vs assign

charge is a noun but assign is not a noun.

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

As verbs, assign is a hypernym of charge; that is, assign is a word with a broader meaning than charge:

Other hypernyms of charge include ascribe, attribute, impute.

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

charge: assign a duty, responsibility or obligation to
assign: give an assignment to (a person) to a post, or assign a task to (a person)

charge (noun)	assign (noun)
attention and management implying responsibility for safety
an impetuous rush toward someone or something
a special assignment that is given to a person or group
a quantity of explosive to be set off at one time
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)	assign (verb)
energize a battery by passing a current through it in the direction opposite to discharge	select something or someone for a specific purpose
cause formation of a net electrical charge in or on	attribute or credit to
saturate	decide as to where something belongs in a scheme
attribute responsibility to	attribute or give
set or ask for a certain price	transfer one's right to
file a formal charge against	give out
impose a task upon, assign a responsibility to	make undue claims to having
blame for, make a claim of wrongdoing or misbehavior against	give an assignment to (a person) to a post, or assign a task to (a person)
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