rum vs demerara rum

rum and demerara rum both are nouns.

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

As nouns, demerara rum is a hyponym of rum; that is, demerara rum is a word with a more specific, narrower meaning than rum:

Other hyponyms of rum include grog, demerara, Jamaica rum.

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

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