smuggling vs gunrunning

smuggling and gunrunning both are nouns.

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

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

smuggling: secretly importing prohibited goods or goods on which duty is due
gunrunning: the smuggling of guns and ammunition into a country secretly and illegally

smuggling (noun)	gunrunning (noun)
secretly importing prohibited goods or goods on which duty is due	the smuggling of guns and ammunition into a country secretly and illegally