classical vs standard

classical and standard both are nouns.

Word	Noun	Adjective	Verb	Adverb
classical	Yes	Yes	No	No
standard	Yes	Yes	No	No

classical (noun)	standard (noun)
traditional genre of music conforming to an established form and appealing to critical interest and developed musical taste	any distinctive flag
	an upright pole or beam (especially one used as a support)
	the ideal in terms of which something can be judged
	a basis for comparison; a reference point against which other things can be evaluated
	the value behind the money in a monetary system
	a board measure = 1980 board feet

classical (adjective)	standard (adjective)
of or relating to the first significant period of a civilization, culture, area of study, etc.	established or well-known or widely recognized as a model of authority or excellence
of or relating to the study of the literary works of ancient Greece and Rome	conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind
of or relating to the languages used by ancient standard authors	conforming to the established language usage of educated native speakers
well-known and long-established in form or style	commonly used or supplied
of or pertaining to or characteristic of the ancient Greeks and Romans, especially their art, literature, or culture	regularly and widely used or sold
of or relating to music in the European tradition, such as symphonies and operas
(physics) relating to or based on concepts that preceded the theories of relativity and quantum mechanics