safe-deposit box vs safety deposit box

safe-deposit box and safety deposit box both are nouns.

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

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

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

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

safe-deposit box (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