Thesaurus.com
Dictionary.com

reactionist

NOUN
reactionary
Synonyms
STRONGEST
archconservative right-winger rightist traditionalist
STRONG
counterrevolutionary royalist ultraconservative
WEAK
bitter-ender die-hard fogy hard hat old fogy standpatter
Antonyms
WEAK
liberal progressive radical
NOUN
ultraconservative
Synonyms
STRONGEST
reactionary
STRONG
counterrevolutionary die-hard right-winger rightist traditionalist
WEAK
Tory bitter-ender hard hat royalist standpatter