safety deposit box vs safety-deposit

safety deposit box and safety-deposit both are nouns.

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

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

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

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

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