The DICT Development Group

  Plangent \Plan"gent\, a. [L. plangens, -entis, fr. plangere to
     beat. See Plaint.]
     Beating; dashing, as a wave. [R.] "The plangent wave." --H.
     Taylor.
     [1913 Webster] Plani

  plangent
      adj 1: loud and resounding; "plangent bells"; "the plangent
             minority"

  75 Moby Thesaurus words for "plangent":
     Jeremianic, aggrieved, anguished, booming, careworn, complaining,
     consonant, deafening, doleful, dolorous, dumb with grief,
     ear-piercing, ear-rending, ear-splitting, earthshaking,
     faultfinding, forte, fortissimo, fretful, full, grief-stricken,
     griefful, grieved, grievous, howling, in grief, lamentable,
     lamentive, loud, loud-sounding, loudish, lugubrious, mellow,
     moanful, mournful, orotund, pealing, peevish, petulant, piercing,
     plaintive, plunged in grief, puling, pulsing, querulous, resonant,
     resonating, resounding, rich, ringing, rolling, rotund, round,
     rueful, sonorous, sorrowed, sorrowful, sorrowing, stentoraphonic,
     stentorian, stentorious, tearful, throbbing, thunderous,
     tonitruant, tonitruous, ululant, vibrant, vibrating, wailful,
     whimpering, whining, whiny, window-rattling, woeful