commerce vs importing

commerce and importing both are nouns.

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

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

commerce: transactions (sales and purchases) having the objective of supplying commodities (goods and services)
importing: the commercial activity of buying and bringing in goods from a foreign country

commerce (noun)	importing (noun)
transactions (sales and purchases) having the objective of supplying commodities (goods and services)	the commercial activity of buying and bringing in goods from a foreign country
social exchange, especially of opinions, attitudes, etc.