class act vs ideal

class act and ideal both are nouns.

Word	Noun	Adjective	Verb	Adverb
class act	Yes	No	No	No
ideal	Yes	Yes	No	No

As nouns, ideal is a hypernym of class act; that is, ideal is a word with a broader meaning than class act:

Other hypernyms of class act include apotheosis, nonesuch, nonpareil, nonsuch, paragon, saint.

class act (noun)	ideal (noun)
someone who shows impressive and stylish excellence	the idea of something that is perfect; something that one hopes to attain
	model of excellence or perfection of a kind; one having no equal

class act (adjective)	ideal (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