constitutionalist vs proponent

constitutionalist and proponent both are nouns.

Word	Noun	Adjective	Verb	Adverb
constitutionalist	Yes	No	No	No
proponent	Yes	No	No	No

As nouns, proponent is a hypernym of constitutionalist; that is, proponent is a word with a broader meaning than constitutionalist:

Other hypernyms of constitutionalist include advocate, advocator, exponent.

constitutionalist (noun)	proponent (noun)
an advocate of constitutional government	a person who pleads for a cause or propounds an idea