ideal vs crackerjack

ideal and crackerjack both are nouns.

Word	Noun	Adjective	Verb	Adverb
ideal	Yes	Yes	No	No
crackerjack	Yes	No	No	No

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

Other hyponyms of ideal include jimdandy, jimhickey, class act, humdinger.

ideal (noun)	crackerjack (noun)
the idea of something that is perfect; something that one hopes to attain	something excellent of its kind
model of excellence or perfection of a kind; one having no equal	someone excellent of their kind

ideal (adjective)	crackerjack (adjective)
of or relating to the philosophical doctrine of the reality of ideas
constituting or existing only in the form of an idea or mental image or conception
conforming to an ultimate standard of perfection or excellence; embodying an ideal