surety vs hostage

surety and hostage both are nouns.

Word	Noun	Adjective	Verb	Adverb
surety	Yes	No	No	No
hostage	Yes	No	No	No

As nouns, surety and hostage are synonyms defined as:

surety and hostage: a prisoner who is held by one party to insure that another party will meet specified terms

surety (noun)	hostage (noun)
something clearly established	a prisoner who is held by one party to insure that another party will meet specified terms
a guarantee that an obligation will be met
one who provides a warrant or guarantee to another
a prisoner who is held by one party to insure that another party will meet specified terms
property that your creditor can claim in case you default on your obligation