Revivalist(noun)
A person who tries to make something popular again.
Hindi meaning:पुनरुत्थानवादी
Synonyms: Preacher, Missionary, Propagandist, Evangelist
Antonyms: Follower, Crowd, Common
Example: He is the only revivalist I have ever seen.
Trick to remember: Rival revivalist hote hain. 
