RITUALIST
ritualist
(noun) a social anthropologist who is expert on rites and ceremonies
ritualist
(noun) an advocate of strict observance of ritualistic forms
Source: WordNet® 3.1
Etymology
Noun
ritualist (plural ritualists)
One skilled in ritual.
One excessively concerned with religious ritual.
One rigidly adhering to institutional procedures.
Source: Wiktionary
Rit"u*al*ist, n. Etym: [CF. F. ritualiste.]
Definition: One skilled un, or attached to, a ritual; one who advocates or
practices ritualism.
Source: Webster’s Unabridged Dictionary 1913 Edition