sailor vs military personnel

sailor and military personnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
sailor	Yes	No	No	No
military personnel	Yes	No	No	No

As nouns, military personnel is a hypernym of sailor; that is, military personnel is a word with a broader meaning than sailor:

sailor: a serviceman in the navy
military personnel: someone who serves in the armed forces; a member of a military force

Other hypernyms of sailor include man, military man, serviceman.

sailor (noun)	military personnel (noun)
a stiff hat made of straw with a flat crown	soldiers collectively
any member of a ship's crew	someone who serves in the armed forces; a member of a military force
a serviceman in the navy