demerara rum vs rum

demerara rum and rum both are nouns.

Word	Noun	Adjective	Verb	Adverb
demerara rum	Yes	No	No	No
rum	Yes	Yes	No	No

As nouns, rum is a hypernym of demerara rum; that is, rum is a word with a broader meaning than demerara rum:

demerara rum (noun)	rum (noun)
dark rum from Guyana	a card game based on collecting sets and sequences; the winner is the first to meld all their cards
	liquor distilled from fermented molasses

demerara rum (adjective)	rum (adjective)
	beyond or deviating from the usual or expected