transaction vs commerce

transaction and commerce both are nouns.

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

As nouns, commerce is a hyponym of transaction; that is, commerce is a word with a more specific, narrower meaning than transaction:

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

transaction (noun)	commerce (noun)
the act of transacting within or between groups (as carrying on commercial activities)	transactions (sales and purchases) having the objective of supplying commodities (goods and services)
	social exchange, especially of opinions, attitudes, etc.