peculiar vs rum

peculiar is not a noun while rum is a noun.

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

As adjectives, peculiar and rum are synonyms defined as:

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

peculiar (noun)	rum (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

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