importing vs smuggling

importing and smuggling both are nouns.

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

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

importing: the commercial activity of buying and bringing in goods from a foreign country
smuggling: secretly importing prohibited goods or goods on which duty is due

importing (noun)	smuggling (noun)
the commercial activity of buying and bringing in goods from a foreign country	secretly importing prohibited goods or goods on which duty is due