shore patrol vs military police

shore patrol and military police both are nouns.

Word	Noun	Adjective	Verb	Adverb
shore patrol	Yes	No	No	No
military police	Yes	No	No	No

As nouns, military police is a hypernym of shore patrol; that is, military police is a word with a broader meaning than shore patrol:

shore patrol: the military police of the navy
military police: a military corps that enforces discipline and guards prisoners

Other hypernyms of shore patrol include MP.

shore patrol (noun)	military police (noun)
the military police of the navy	a military corps that enforces discipline and guards prisoners