deadbeat vs defaulter

deadbeat and defaulter both are nouns.

Word	Noun	Adjective	Verb	Adverb
deadbeat	Yes	No	No	No
defaulter	Yes	No	No	No

As nouns, deadbeat and defaulter are synonyms defined as:

deadbeat and defaulter: someone who fails to meet a financial obligation

deadbeat (noun)	defaulter (noun)
someone who fails to meet a financial obligation	a contestant who forfeits a match
	someone who fails to meet a financial obligation
	someone who fails to make a required appearance in court