standard vs acceptable

standard is a noun but acceptable is not a noun.

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

standard (noun)	acceptable (noun)
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

standard (adjective)	acceptable (adjective)
established or well-known or widely recognized as a model of authority or excellence	worthy of acceptance or satisfactory
conforming to or constituting a standard of measurement or value; or of the usual or regularized or accepted kind	adequate for the purpose
conforming to the established language usage of educated native speakers	meeting requirements
commonly used or supplied	judged to be in conformity with approved usage
regularly and widely used or sold