lockbox vs safety deposit box

lockbox and safety deposit box both are nouns.

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

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

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

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

lockbox (noun)	safety 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