singular vs rummy

singular and rummy both are nouns.

Word	Noun	Adjective	Verb	Adverb
singular	Yes	Yes	No	No
rummy	Yes	Yes	No	No

As adjectives, singular and rummy are synonyms defined as:

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

singular (noun)	rummy (noun)
the form of a word that is used to denote a singleton	a card game based on collecting sets and sequences; the winner is the first to meld all their cards
	a chronic drinker

singular (adjective)	rummy (adjective)
grammatical number category referring to a single item or unit	beyond or deviating from the usual or expected
composed of one member, set, or kind
unusual or striking
being a single and separate person or thing
the single one of its kind
beyond or deviating from the usual or expected