reactionary vs reactionist

reactionary is a noun but reactionist is not a noun.

Word	Noun	Adjective	Verb	Adverb
reactionary	Yes	Yes	No	No
reactionist	No	Yes	No	No

As adjectives, reactionary and reactionist are synonyms defined as:

reactionary and reactionist: opposed to political or social liberalism or reform

Other synonyms of reactionary include far-right.

reactionary (noun)	reactionist (noun)
an extreme conservative; an opponent of progress or liberalism

reactionary (adjective)	reactionist (adjective)
opposed to political or social liberalism or reform	opposed to political or social liberalism or reform