safe-deposit box vs lockbox

safe-deposit box and lockbox both are nouns.

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

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

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

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

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