delinquency vs dereliction

delinquency and dereliction both are nouns.

Word	Noun	Adjective	Verb	Adverb
delinquency	Yes	No	No	No
dereliction	Yes	No	No	No

As nouns, delinquency and dereliction are synonyms defined as:

Other synonyms of delinquency include willful neglect.

delinquency (noun)	dereliction (noun)
an antisocial misdeed in violation of the law by a minor	willful negligence
a tendency to be negligent and uncaring	a tendency to be negligent and uncaring
nonpayment of a debt when due