rudimentary vs basic

rudimentary is not a noun while basic is a noun.

Word	Noun	Adjective	Verb	Adverb
rudimentary	No	Yes	No	No
basic	Yes	Yes	No	No

rudimentary (noun)	basic (noun)
	(usually in the plural) a necessary commodity for which demand is constant

rudimentary (adjective)	basic (adjective)
being or involving basic facts or principles	pertaining to or constituting a base or basis
being in the earliest stages of development	of or denoting or of the nature of or containing a base
not fully developed in mature animals	reduced to the simplest and most significant form possible without loss of generality
	serving as a base or starting point