standard vs quantity

standard and quantity both are nouns.

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

standard (noun)	quantity (noun)
any distinctive flag	how much there is or how many there are of something that you can quantify
an upright pole or beam (especially one used as a support)	an adequate or large amount
the ideal in terms of which something can be judged	the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable
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

standard (adjective)	quantity (adjective)
established or well-known or widely recognized as a model of authority or excellence
conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind
conforming to the established language usage of educated native speakers
commonly used or supplied
regularly and widely used or sold