credit vs assign

credit is a noun but assign is not a noun.

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

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

Other hypernyms of credit include ascribe, attribute, impute.

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

Other hypernyms of credit include ascribe, attribute, impute.

credit (noun)	assign (noun)
recognition by a college or university that a course of studies has been successfully completed; typically measured in semester hours
used in the phrase `to your credit' in order to indicate an achievement deserving praise
an estimate, based on previous dealings, of a person's or an organization's ability to fulfill their financial commitments
approval
an entry on a list of persons who contributed to a film or written work
a short note recognizing a source of information or of a quoted passage
arrangement for deferred payment for goods and services
an accounting entry acknowledging income or capital items
money available for a client to borrow

credit (verb)	assign (verb)
have trust in; trust in the truth or veracity of	select something or someone for a specific purpose
give someone credit for something	attribute or credit to
ascribe an achievement to	decide as to where something belongs in a scheme
enter as credit	attribute or give
	transfer one's right to
	give out
	make undue claims to having
	give an assignment to (a person) to a post, or assign a task to (a person)