The Collaborative International Dictionary of English v.0.48:

Monody \Mon"o*dy\, n.; pl. Monodies. [L. monodia, Gr. ?, fr. ?
   singing alone; mo`nos single + ? song: cf. F. monodie. See
   Ode.]
   A species of poem of a mournful character, in which a single
   mourner expresses lamentation; a song for one voice.
   [1913 Webster]

WordNet (r) 3.0 (2006):

monody
    n 1: music consisting of a single vocal part (usually with
         accompaniment) [syn: monophony, monophonic music,
         monody] [ant: concerted music, polyphonic music,
         polyphony]

Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "monody":
   English sonnet, Horatian ode, Italian sonnet, Petrarchan sonnet,
   Pindaric ode, Sapphic ode, Shakespearean sonnet, accord,
   accordance, alba, anacreontic, attune, attunement, balada, ballad,
   ballade, bucolic, canso, chanson, chime, chiming, clerihew,
   concentus, concert, concord, concordance, consonance, consonancy,
   consort, coronach, dead march, death knell, death song, diapason,
   dirge, dithyramb, eclogue, elegy, epic, epicedium, epigram,
   epithalamium, epode, epopee, epopoeia, epos, eulogy, euphony,
   funeral march, funeral oration, funeral song, georgic, ghazel,
   graveside oration, haiku, harmonics, harmony, heavy harmony,
   homophony, idyll, jingle, keen, knell, limerick, lyric, madrigal,
   monochord, monophony, muffled drums, narrative poem, nursery rhyme,
   ode, palinode, passing bell, pastoral, pastoral elegy, pastorela,
   pastourelle, poem, prothalamium, requiem, rhyme, rondeau, rondel,
   roundel, roundelay, satire, sestina, sloka, song, sonnet,
   sonnet sequence, symphony, synchronism, synchronization, tanka,
   tenso, tenzone, three-part harmony, threnode, threnody, triolet,
   troubadour poem, tune, unison, unisonance, verse, verselet,
   versicle, villanelle, virelay