money box vs savings bank

money box and savings bank both are nouns.

Word	Noun	Adjective	Verb	Adverb
money box	Yes	No	No	No
savings bank	Yes	No	No	No

As nouns, money box and savings bank are synonyms defined as:

money box and savings bank: a container (usually with a slot in the top) for keeping money at home

Other synonyms of money box include bank, coin bank.

money box (noun)	savings bank (noun)
a strongbox for holding cash	a container (usually with a slot in the top) for keeping money at home
a container (usually with a slot in the top) for keeping money at home	a thrift institution in the northeastern United States; since deregulation in the 1980s they offer services competitive with many commercial banks