lockbox vs safe-deposit

lockbox and safe-deposit both are nouns.

Word	Noun	Adjective	Verb	Adverb
lockbox	Yes	No	No	No
safe-deposit	Yes	No	No	No

As nouns, lockbox and safe-deposit are synonyms defined as:

lockbox and safe-deposit: a fireproof metal strongbox (usually in a bank) for storing valuables

Other synonyms of lockbox include deposit box, safe-deposit box, safety-deposit, safety deposit box.

lockbox (noun)	safe-deposit (noun)
a fireproof metal strongbox (usually in a bank) for storing valuables	a fireproof metal strongbox (usually in a bank) for storing valuables