safety deposit box vs deposit box

safety deposit box and deposit box both are nouns.

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

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

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

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

safety deposit box (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