convention vs conventionalism

convention and conventionalism both are nouns.

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

As nouns, convention and conventionalism are synonyms defined as:

convention and conventionalism: orthodoxy as a consequence of being conventional

Other synonyms of convention include conventionality.

convention (noun)	conventionalism (noun)
the act of convening	orthodoxy as a consequence of being conventional
orthodoxy as a consequence of being conventional
something regarded as a normative example
(diplomacy) an international agreement
a large formal assembly