trading vs commerce

trading and commerce both are nouns.

Word	Noun	Adjective	Verb	Adverb
trading	Yes	No	No	No
commerce	Yes	No	No	No

As nouns, commerce is a hypernym of trading; that is, commerce is a word with a broader meaning than trading:

trading: buying or selling securities or commodities
commerce: transactions (sales and purchases) having the objective of supplying commodities (goods and services)

Other hypernyms of trading include commercialism, mercantilism.

trading (noun)	commerce (noun)
buying or selling securities or commodities	transactions (sales and purchases) having the objective of supplying commodities (goods and services)
	social exchange, especially of opinions, attitudes, etc.