shipping vs navigation

shipping and navigation both are nouns.

Word	Noun	Adjective	Verb	Adverb
shipping	Yes	No	No	No
navigation	Yes	No	No	No

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

shipping (noun)	navigation (noun)
the commercial enterprise of moving goods and materials	the guidance of ships or airplanes from place to place
conveyance provided by the ships belonging to one country or industry	the work of a sailor
	ship traffic