nonesuch vs jimdandy

nonesuch and jimdandy both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonesuch	Yes	No	No	No
jimdandy	Yes	No	No	No

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

Other hyponyms of nonesuch include crackerjack, jimhickey, class act, humdinger.

nonesuch (noun)	jimdandy (noun)
model of excellence or perfection of a kind; one having no equal	something excellent of its kind
	someone excellent of their kind