conventionalism vs conventional

conventionalism is a noun but conventional is not a noun.

Word	Noun	Adjective	Verb	Adverb
conventionalism	Yes	No	No	No
conventional	No	Yes	No	No

conventionalism (noun)	conventional (noun)
orthodoxy as a consequence of being conventional

conventionalism (adjective)	conventional (adjective)
	following accepted customs and proprieties
	unimaginative and conformist
	(weapons) using energy for propulsion or destruction that is not nuclear energy
	rigidly formal or bound by convention
	represented in simplified or symbolic form
	conforming with accepted standards
	in accord with or being a tradition or practice accepted from the past