coin collecting

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the collection and study of money (and coins in particular)
• Syn:
numismatics, numismatology, coin collection
• Derivationally related forms:
numismatologist (for: numismatology), numismatist (for: numismatics)
• Hypernyms:
collection, collecting, assembling, aggregation