(n.) A noun suffix denoting an agent, or doer, one who practices, a believer in; as, theorist, one who theorizes; socialist, one who holds to socialism; sensualist, one given to sensuality.
Thesaurus Entries
Christian, God-fearing man, accepter, catechumen, churchgoer, churchite, churchman, communicant, convert, cultist, daily communicant, devotee, devotionalist, disciple, fanatic, fideist, follower, good Christian, ist, neophyte, pietist, proselyte, receiver, religioner, religionist, religious believer, saint, the assured, the believing, the faithful, theist, true believer, truster, votary, zealot
