commerce vs dealing

commerce and dealing both are nouns.

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

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

commerce: transactions (sales and purchases) having the objective of supplying commodities (goods and services)
dealing: the act of transacting within or between groups (as carrying on commercial activities)

Other hypernyms of commerce include dealings, transaction.

commerce (noun)	dealing (noun)
transactions (sales and purchases) having the objective of supplying commodities (goods and services)	method or manner of conduct in relation to others
social exchange, especially of opinions, attitudes, etc.	the act of transacting within or between groups (as carrying on commercial activities)