[1] : The Collaborative International Dictionary of English v.0.48

raucous \rau"cous\ radd"ku^s, a. l. raucus.
   hoarse; harsh; rough; as, a raucous, thick tone. "his voice
   slightly raucous." --aytoun. -- rau"cously, adv.
   1913 webster
see also:
rau"cously 

[2] : WordNet (r) 2.0

raucous
     adj 1: unpleasantly loud and harsh syn: strident
     2: disturbing the public peace; loud and rough; "a raucous
        party"; "rowdy teenagers" syn: rowdy
see also:
strident rowdy 

[3] : Moby Thesaurus II by Grady Ward, 1.0

78 moby thesaurus words for "raucous":
   absonant, atonal, boisterous, brassy, brazen, brusque, cacophonous,
   choked, coarse, cracked, croaking, croaky, diaphonic, disconsonant,
   discordant, disharmonic, disharmonious, disorderly, dissonant, dry,
   ear-splitting, flat, grating, gruff, guttural, harsh,
   harsh-sounding, hoarse, husky, immelodious, inharmonic,
   inharmonious, jarring, loud, metallic, musicless, noisy,
   nonmelodious, off, off-key, off-tone, out of pitch, out of tone,
   out of tune, piercing, ragged, rasping, raucid, rough, roupy,
   rowdy, rowdyish, rude, rumbustious, scratching, scratchy, sharp,
   shrill, sour, squawking, squawky, stertorous, strangled, strident,
   stridulous, termagant, thick, throaty, tinny, tumultuous, tuneless,
   unharmonious, unmelodious, unmusical, unruly, untunable, untuned,
   untuneful

Raucous >> R Words
Raucous, definition of term: Raucous
raucous_pag1.html