Psalm

Psalm
    n 1: one of the 150 lyrical poems and prayers that comprise the
         Book of Psalms in the Old Testament; said to have been
         written by David
    2: any sacred song used to praise the deity
    v 1: sing or celebrate in psalms; "He psalms the works of God"
    

Psalm \Psalm\, v. t.
   To extol in psalms; to sing; as, psalming his praises.
   --Sylvester.
   [1913 Webster]
    

Psalm \Psalm\, n. [OE. psalm, salm, AS. sealm, L. psalmus,
   psalma, fr. Gr. ?, ?, fr. ? to pull, twitch, to play upon a
   stringed instrument, to sing to the harp: cf. OF. psalme,
   salme, F. psaume.]
   1. A sacred song; a poetical composition for use in the
      praise or worship of God.
      [1913 Webster]

            Humus devout and holy psalms
            Singing everlastingly.                --Milton.
      [1913 Webster]

   2. Especially, one of the hymns by David and others,
      collected into one book of the Old Testament, or a modern
      metrical version of such a hymn for public worship.
      [1913 Webster]
    

96 Moby Thesaurus words for "psalm":
      Agnus Dei, Benedicite, Gloria, Gloria Patri, Gloria in Excelsis,
      Introit, Magnificat, Miserere, Negro spiritual, Nunc Dimittis,
      Te Deum, Trisagion, Vedic hymn, alleluia, answer, anthem, antiphon,
      antiphony, ballad, cantata, canticle, carol, celebrate, chant,
      chirp, chirrup, choir, chorale, chorus, church music, croon,
      cry up, descant, do-re-mi, doxology, eulogize, extol, glorify,
      gospel, gospel music, hallelujah, hosanna, hum, hymn,
      hymn of praise, hymn-tune, hymnody, hymnography, hymnology,
      intonate, intone, introit, laud, lilt, magnify, mantra, mass,
      minstrel, motet, offertory, offertory sentence, oratorio, paean,
      passion, pipe, prosodion, psalmody, quaver, recessional, report,
      requiem, requiem mass, response, responsory, roulade, sacred music,
      serenade, shake, sing, sing in chorus, sol-fa, solmizate,
      spiritual, tremolo, trill, troll, tweedle, tweedledee, twit,
      twitter, versicle, vocalize, warble, whistle, white spiritual,
      yodel