We don't have synonyms for communicants yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are communicate, communicant and communicans.
(n) :
(Christianity) A person who receives (or is allowed to receive) the elements (i.e., bread and wine) of the sacrament of Holy Communion. (Compare also these terms: communion, Communion, Lord's Supper, Mass, Eucharist, Divine Liturgy.)
(n) :
(Christianity) A person who receives (or is allowed to receive) the elements (i.e., bread and wine) of the sacrament of Holy Communion. (Compare also these terms: communion, Communion, Lord's Supper, Mass, Eucharist, Divine Liturgy.)