unsecured bond vs debenture bond

unsecured bond and debenture bond both are nouns.

Word	Noun	Adjective	Verb	Adverb
unsecured bond	Yes	No	No	No
debenture bond	Yes	No	No	No

As nouns, unsecured bond and debenture bond are synonyms defined as:

unsecured bond and debenture bond: the ability of a customer to obtain goods or services before payment, based on the trust that payment will be made in the future

Other synonyms of unsecured bond include debenture.

unsecured bond (noun)	debenture bond (noun)
the ability of a customer to obtain goods or services before payment, based on the trust that payment will be made in the future	the ability of a customer to obtain goods or services before payment, based on the trust that payment will be made in the future