bunker vs fox hole

bunker and fox hole both are nouns.

Word	Noun	Adjective	Verb	Adverb
bunker	Yes	No	Yes	No
fox hole	Yes	No	No	No

As nouns, fox hole is a hyponym of bunker; that is, fox hole is a word with a more specific, narrower meaning than bunker:

bunker: a fortification of earth; mostly or entirely below ground
fox hole: a small dugout with a pit for individual shelter against enemy fire

Other hyponyms of bunker include foxhole, funk hole.

bunker (noun)	fox hole (noun)
a hazard on a golf course	a small dugout with a pit for individual shelter against enemy fire
a fortification of earth; mostly or entirely below ground
a large container for storing fuel

bunker (verb)	fox hole (verb)
hit a golf ball into a bunker
transfer cargo from a ship to a warehouse
fill (a ship's bunker) with coal or oil