pratiquant
/ˌpratiːˈkɒ̃/ /ˌpratiːˈkɒn(t)/adjective
Making a practice of religious duties or observances; practising.
noun
A person who practises a religion.
Origin
Early 20th century. From French pratiquant observing the teachings and rules of a religion, use as adjective of the present participle of pratiquer.