bunker vs fuel

bunker and fuel both are nouns.

Word	Noun	Adjective	Verb	Adverb
bunker	Yes	No	Yes	No
fuel	Yes	No	Yes	No

As verbs, fuel is a hypernym of bunker; that is, fuel is a word with a broader meaning than bunker:

bunker (noun)	fuel (noun)
a hazard on a golf course	a substance that can be consumed to produce energy
a fortification of earth; mostly or entirely below ground
a large container for storing fuel

bunker (verb)	fuel (verb)
hit a golf ball into a bunker	stimulate
transfer cargo from a ship to a warehouse	provide with a combustible substance that provides energy
fill (a ship's bunker) with coal or oil	provide with fuel
	take in fuel, as of a ship