communicant(n = noun.person) - a person entitled to receive Communion;
is a kind of christian

1.  One who partakes of, or is entitled to partake of, the sacrament of the Lord's supper; a church member. [1913 Webster]
"A never-failing monthly communicant." [1913 Webster]

2.  One who communicates. Foxe. [1913 Webster]

   Communicating. Coleridge. [1913 Webster]

communicant, n.
1 a person who receives Holy Communion, esp. regularly.
2 a person who imparts information.

Etymology:
L communicare communicant- (as COMMON)

N  worship, adoration, devotion, aspiration, homage, service, humiliation, kneeling, genuflection, prostration, prayer, invocation, supplication, rogation, intercession, orison, holy breathing, petition, collect, litany, Lord's prayer, paternoster, beadroll, latria, dulia, hyperdulia, vigils, revival, cult, anxious meeting, camp meeting, ebenezer, virginal, thanksgiving, giving thanks, returning thanks, grace, praise, glorification, benediction, doxology, hosanna, hallelujah, allelujah, Te Deum, non nobis Domine, nunc dimittis, paean, benschen, Ave Maria, O Salutaris, Sanctus, The Annunciation, Tersanctus, Trisagion, psalm, psalmody, hymn, plain song, chant, chaunt, response, anthem, motet, antiphon, antiphony, oblation, sacrifice, incense, libation, burnt offering, heave offering, votive offering, offertory, discipline, self-discipline, self-examination, self-denial, fasting, divine service, office, duty, exercises, morning prayer, mass, matins, evensong, vespers, undernsong, tierce, holyday, worshipper, congregation, communicant, celebrant, worshipping, devout, devotional, reverent, pure, solemn, fervid, Int, hallelujah, allelujah!, hosanna!, glory be to God!, O Lord!, pray God that!, God grant, God bless, God save, God forbid!, sursum corda, making their lives a prayer, ora et labora, prayers ardent open heaven.