rum vs peculiar

rum is a noun but peculiar is not a noun.

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

As adjectives, rum and peculiar are synonyms defined as:

Other synonyms of rum include curious, funny, odd, queer, rummy, singular.

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

rum (adjective)	peculiar (adjective)
beyond or deviating from the usual or expected	characteristic of one only; distinctive or special
	unique or specific to a person or thing or category
	beyond or deviating from the usual or expected
	markedly different from the usual; special