numismatics vs coin collection

numismatics and coin collection both are nouns.

Word	Noun	Adjective	Verb	Adverb
numismatics	Yes	No	No	No
coin collection	Yes	No	No	No

As nouns, numismatics and coin collection are synonyms defined as:

numismatics and coin collection: the collection and study of money (and coins in particular)

Other synonyms of numismatics include coin collecting, numismatology.

numismatics (noun)	coin collection (noun)
the collection and study of money (and coins in particular)	the collection and study of money (and coins in particular)
	a collection of coins