lockbox vs deposit box

lockbox and deposit box both are nouns.

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

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

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

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

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