The Collaborative International Dictionary of English v.0.48:

Hoopoe \Hoop"oe\, Hoopoo \Hoop"oo\, n. [So called from its cry;
   cf. L. upupa, Gr. ?, D. hop, F. huppe; cf. also G.
   wiedenhopf, OHG. wituhopfo, lit., wood hopper.] (Zool.)
   A European bird of the genus Upupa (Upupa epops), having
   a beautiful crest, which it can erect or depress at pleasure,
   and a slender down-curving bill. Called also hoop, whoop.
   The name is also applied to several other species of the same
   genus and allied genera.

The Collaborative International Dictionary of English v.0.48:

Hoop \Hoop\, v. i. [OE. houpen; cf. F. houper to hoop, to shout;
   -- a hunting term, prob. fr. houp, an interj. used in
   calling. Cf. Whoop.]
   1. To utter a loud cry, or a sound imitative of the word, by
      way of call or pursuit; to shout. [Usually written
      whoop.]
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   2. To whoop, as in whooping cough. See Whoop.
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   Hooping cough. (Med.) See Whooping cough.
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The Collaborative International Dictionary of English v.0.48:

Whoop \Whoop\, n. [See Hoopoe.] (Zool.)
   The hoopoe.
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The Collaborative International Dictionary of English v.0.48:

Whoop \Whoop\, v. i. [imp. & p. p. Whooped; p. pr. & vb. n.
   Whooping.] [OE. houpen. See Hoop, v. i.]
   [1913 Webster]
   1. To utter a whoop, or loud cry, as eagerness, enthusiasm,
      or enjoyment; to cry out; to shout; to halloo; to utter a
      war whoop; to hoot, as an owl.
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            Each whooping with a merry shout.     --Wordsworth.
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            When naught was heard but now and then the howl
            Of some vile cur, or whooping of the owl. --W.
                                                  Browne.
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   2. To cough or breathe with a sonorous inspiration, as in
      whooping cough.
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The Collaborative International Dictionary of English v.0.48:

Whoop \Whoop\, v. t.
   To insult with shouts; to chase with derision.
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         And suffered me by the voice of slaves to be
         Whooped out of Rome.                     --Shak.
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The Collaborative International Dictionary of English v.0.48:

Whoop \Whoop\, n.
   1. A shout of pursuit or of war; a very of eagerness,
      enthusiasm, enjoyment, vengeance, terror, or the like; an
      halloo; a hoot, or cry, as of an owl.
      [1913 Webster]

            A fox, crossing the road, drew off a considerable
            detachment, who clapped spurs to their horses, and
            pursued him with whoops and halloos.  --Addison.
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            The whoop of the crane.               --Longfellow.
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   2. A loud, shrill, prolonged sound or sonorous inspiration,
      as in whooping cough.
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WordNet (r) 3.0 (2006):

whoop
    n 1: a loud hooting cry of exultation or excitement
    v 1: shout, as if with joy or enthusiasm; "The children whooped
         when they were led to the picnic table"
    2: cough spasmodically; "The patient with emphysema is hacking
       all day" [syn: hack, whoop]

Moby Thesaurus II by Grady Ward, 1.0:

42 Moby Thesaurus words for "whoop":
   ace, bark, battle cry, bawl, bellow, call, caterwaul, cheer, cry,
   damn, hail, halloo, holler, hollo, hoot, howl, hurrah, jot, lota,
   modicum, rallying cry, ray, roar, scream, screech, shout, shred,
   shriek, squall, squawk, squeal, war cry, war whoop, whit, yammer,
   yap, yawl, yawp, yell, yelp, yo-ho, yowl