navigation vs employment

navigation and employment both are nouns.

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

As nouns, employment is a hypernym of navigation; that is, employment is a word with a broader meaning than navigation:

Other hypernyms of navigation include work.

navigation (noun)	employment (noun)
the guidance of ships or airplanes from place to place	the occupation for which you are paid
the work of a sailor	the act of using
ship traffic	the act of giving someone a job
	the state of being employed or having a job