restorationism
Concise Oxford English Dictionary © 2008 Oxford University Press:
restorationism/rɛstəˈreɪʃ(ə)nɪz(ə)m/
▶noun a charismatic Christian movement seeking to restore the beliefs and practices of the early Church.
– derivatives
restorationist noun & adjective.
restorationist noun & adjective.
'restorationism' also found in these Oxford entries:

